DHR System User Manual

Nucline TM SPIRIT DH-V DUAL - HEAD SPECT AND WHOLE BODY

DIGITAL GAMMA CAMERA

Service Manual Revision 1.03

Part number: DV-93-20-01

The information and drawings set forth in this manual are the property of Mediso Ltd. No part of this document may be copied without the prior consent of Mediso Ltd.

Manufacturer reserves the right to revise or update the contents of this manual due to modifications or improvements in the design of the equipment without obligation to notify any person or organization of such changes.

Nucline is a registered trademark of Mediso Ltd. Other brand or product names are trademarks or registered trademarks of their respective holders.

Mediso Ltd. - Medical Imaging Systems

Address: H-1022 Budapest, Alstrkvsz t 14. HUNGARY Phone: +36-1 3993030 Fax: +36-1 3993040 E-Mail: [email protected]

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Disclaimer Mediso Ltd. and its official representatives may not be held responsible for personal injury or damage of any kind, expressed or implied, caused by, or emerging out of the use of this equipment, if equipment is not operated in adherence to operating and maintenance procedures set forth in this manual.

Users exchanging files and diskettes should beware of the risk of computer viruses. Damage caused by user provided programs, scripts, or computer viruses are NOT warranted by Mediso Ltd.

Warning

Electrical

Failure to provide an adequate earth ground circuit can result in a shock hazard which can cause serious personal injury.

Only properly trained personnel should be permitted access to any internal part of the equipment. Live electrical terminals and components inside electronics cabinets can present a shock hazard and can cause serious or fatal injury.

Maintenance and service routines beyond those mentioned in this manual must be referred to service personnel authorized by the manufacturer. In the absence of appropriate instructions in this manual do not attempt to make service work on the equipment.

When this equipment is interconnected with other electrical appliances in its normal operation, it is important, that these other appliances also be provided with adequate grounding protection. Faults occurring in any interconnected appliance can degrade the safety of this product.

Mechanical

All moveable assemblies and supporting structures should be operated with care and routinely inspected. Any collision which could damage the equipment, worn components, unusual noises or difficulties in operation should be reported to the manufacturer's office immediately.

Radiation

This equipment does not generate any hazardous radiation. When using radioactive isotopes or compounds, safe and proper handling techniques should always be observed. If radioactive contamination occurs, use the decontamination agent and method as described in your site protocol to clean the outside of the equipment.

Nucline SPIRIT DH-V Service Manual

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ECN Rev. Date Description Pages Approved

0000306 1.01 2006.05.05. New document all

0000534 1.02 2006.07.12. DR interface panel changing 77 - 85

0000645 1.03 2007.05.21. Front panel changing 159-163

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Table of contents

HDisclaimer .............................................................................................................................................. H3

HWarning .................................................................................................................................................. H3 HElectrical .............................................................................................................................................. H3 HMechanical........................................................................................................................................... H3 HRadiation.............................................................................................................................................. H3

HTable of contents ......................................................................................................H5

HIntroduction...............................................................................................................H9

HScope of manual .....................................................................................................H10

HText Conventions Used in this Manual .................................................................H11

HChapter 1. Safety and Regulatory Information...................................................H12

H1.1 General Safety........................................................................................................................... H12 H1.1.1 Electrical Safety................................................................................................................... H13 H1.1.2 Mechanical Safety ............................................................................................................... H15 H1.1.3 Radiation ............................................................................................................................. H15

H1.2 IEC Symbols Used.................................................................................................................... H16

H1.3 Safety Devices .......................................................................................................................... H17 H1.3.1 Emergency Stop Button ...................................................................................................... H18 H1.3.2 Preventing Collisions........................................................................................................... H18

H1.4 Patient Safety and Emergency Case ...................................................................................... H20 H1.4.1 Patient Handling .................................................................................................................. H20 H1.4.2 Patient Positioning............................................................................................................... H20 H1.4.3 Emergency Case................................................................................................................. H21 H1.4.4 Power Failure Procedure..................................................................................................... H21 H1.4.5 When Electrical Power is Restored..................................................................................... H21

H1.5 Data Safety ................................................................................................................................ H22 H1.5.1 General................................................................................................................................ H22 H1.5.2 Connectivity ......................................................................................................................... H22

H1.6 Safe Operation Guidelines....................................................................................................... H22

H1.7 Safety Labels............................................................................................................................. H23

H1.8 Regulatory Information ............................................................................................................ H24 H1.8.1 Standard Compliance.......................................................................................................... H24 H1.8.2 USA Regulations ................................................................................................................. H25


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HChapter 2. Camera overview................................................................................H26

H2.1 General description .................................................................................................................. H26 H2.1.1 System components ............................................................................................................ H26 H2.1.2 The system connections...................................................................................................... H30

H2.2 DH-V Gantry............................................................................................................................... H32 H2.2.1 Gantry hardware.................................................................................................................. H32 H2.2.2 Gantry computer.................................................................................................................. H32 H2.2.3 Detector heads .................................................................................................................... H34 H2.2.4 Gantry electronics................................................................................................................ H34 H2.2.5 Handcontroller ..................................................................................................................... H34

H2.3 Acquisition console.................................................................................................................. H36 H2.3.1 Color monitor ....................................................................................................................... H36 H2.3.2 Mouse.................................................................................................................................. H37 H2.3.3 Keyboard ............................................................................................................................. H38 H2.3.4 Nucline Electronics Rack .................................................................................................. H39

H2.4 Imaging table............................................................................................................................. H42 H2.4.1 Telescopes .......................................................................................................................... H42 H2.4.2 Motor.................................................................................................................................... H42

H2.5 Collimators and collimator carts............................................................................................. H43 H2.5.1 Collimators........................................................................................................................... H43 H2.5.2 Collimator carts.................................................................................................................... H43

H2.6 Gantry Operation Modes.......................................................................................................... H44 H2.6.1 Normal Mode ....................................................................................................................... H44 H2.6.2 Collision Mode ..................................................................................................................... H45 H2.6.3 Emergency Mode ................................................................................................................ H46 H2.6.4 Service Mode....................................................................................................................... H47 H2.6.5 Calibration Mode ................................................................................................................. H48 H2.6.6 Error Mode........................................................................................................................... H49

HChapter 3. Construction guide ............................................................................H50

H3.1 Changing radius motor timing belt ......................................................................................... H50

H3.2 Changing radius motor ............................................................................................................ H55

H3.3 Changing radius servo amplifier............................................................................................. H55

H3.4 Changing gantry rotate motor timing belt.............................................................................. H57

H3.5 Changing gantry rotate motor................................................................................................. H58

H3.6 Changing gantry rotate servo amplifier ................................................................................. H59

H3.7 Changing PC 104 module ........................................................................................................ H61

H3.8 Changing radius controller circuit .......................................................................................... H63

H3.9 Changing detector cable.......................................................................................................... H64

H3.10 Changing collimator lock panel........................................................................................... H66

H3.11 Collimator cart adjustment................................................................................................... H68

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H3.12 Head removal ........................................................................................................................ H74

H3.13 Head installation ................................................................................................................... H83

H3.14 AMC servo burning............................................................................................................... H91

HChapter 4. Software adjustment..........................................................................H94

H4.1 Installation of the operating system of the Console electronics......................................... H95 H4.1.1 Preparation of the Console electronic rack ......................................................................... H95 H4.1.2 Preparing the completely new Console computer to start the installation of the OS.......... H95 H4.1.3 Switching ON a completely new Console computer ........................................................... H95 H4.1.4 Preparation of the Basic Input / Output System (BIOS)...................................................... H95 H4.1.5 Checking and modifying the BIOS pages ........................................................................... H97

H4.2 Windows 2000 install ............................................................................................................. H101 H4.2.1 Partitioning of the Hard Disk Drive: ................................................................................... H101

H4.3 Console Software Installation Procedure ............................................................................ H114 H4.3.1 Start the installation process ............................................................................................. H117 H4.3.2 Setup new Camera application ......................................................................................... H119 H4.3.3 Modify settings .................................................................................................................. H130 H4.3.4 Backup application ............................................................................................................ H135 H4.3.5 Until you reach the finish. .................................................................................................. H140

H4.4 Gantry Software Upgrade ...................................................................................................... H140 H4.4.1 How to start Gantry Software Upgrade? ........................................................................... H140 H4.4.2 Host side (left side)............................................................................................................ H141 H4.4.3 Gantry side (right side) gantry computer........................................................................ H141 H4.4.4 How to modify CFG files.................................................................................................... H142 H4.4.5 How to create LOG file ...................................................................................................... H143

H4.5 Result of the driver installation............................................................................................. H143 HFolders after installation: ................................................................................................................. H144 H4.5.1 Directory of c:\console....................................................................................................... H144 H4.5.2 Directory of c:\gantry ......................................................................................................... H153 H4.5.3 Directory of D:\CameraBackup ......................................................................................... H155 H4.5.4 Directory of D:\ConsoleInstall............................................................................................ H155 H4.5.5 Directory of D:\Delete Later............................................................................................... H157 H4.5.6 Directory of D:\Img ............................................................................................................ H157 H4.5.7 Directory of D:\Mediso Upload ......................................................................................... H157

HChapter 5. Calibration ........................................................................................ H158

H5.1 Applied devices ...................................................................................................................... H158

H5.2 Process of calibration ............................................................................................................ H159 H5.2.1 Visual checking ................................................................................................................. H159 H5.2.2 Checking the power supply voltages................................................................................. H160 H5.2.3 Checking the pre-amplifiers [Factory only!]....................................................................... H160 H5.2.4 Checking the 1ADC/PMT functionality [Factory only!] ...................................................... H161 H5.2.5 The PMT gain settings ...................................................................................................... H162 H5.2.6 Direction gain settings ....................................................................................................... H163 H5.2.7 The offset-setting of the coordinates................................................................................. H163 H5.2.8 Coarse high-voltage calibration......................................................................................... H164 H5.2.9 The spectrum calibration ................................................................................................... H165 H5.2.10 PMT Coarse auto tuning with Tc99m................................................................................ H166 H5.2.11 Measuring and fixing of the A/D card offset ...................................................................... H168


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H5.2.12 Spatial registration............................................................................................................. H168 H5.2.13 PMT fine auto tuning with Tc99m...................................................................................... H170 H5.2.14 Linearity calibration............................................................................................................ H171 H5.2.15 Intrinsic uniformity loading................................................................................................. H176 H5.2.16 Extrinsic uniformity loading................................................................................................ H177

H5.3 Tests......................................................................................................................................... H177 H5.3.1 Intrinsic uniformity test....................................................................................................... H177 H5.3.2 Extrinsic uniformity test...................................................................................................... H178 H5.3.3 Energy resolution test........................................................................................................ H179 H5.3.4 Spatial registration test ...................................................................................................... H180 H5.3.5 Linearity test ...................................................................................................................... H181 H5.3.6 Max count test ................................................................................................................... H183 H5.3.7 System resolution test ....................................................................................................... H184 H5.3.8 Wholebody resolution test ................................................................................................. H185 H5.3.9 System sensitivity test ....................................................................................................... H186 H5.3.10 Stability test ....................................................................................................................... H187

H5.4 Calibrations and tests of different camera types ................................................................ H188 H5.4.1 COR calibration ................................................................................................................. H188 H5.4.2 COR test ............................................................................................................................ H188

H5.5 Service mode .......................................................................................................................... H190 H5.5.1 LIFT ADJUSTMENT.......................................................................................................... H190 H5.5.2 HOMING ALL .................................................................................................................... H192 H5.5.3 CALIBRATION................................................................................................................... H192

HChapter 6. Perform NEMA measurement..........................................................H201

HChapter 7. Maintenance .....................................................................................H202

H7.1 Maintenance form ................................................................................................................... H202

H7.2 Maintenance tasks.................................................................................................................. H203

HChapter 8. Troubleshooting...............................................................................H207

HAppendix A Installation guide ...........................................................................H213

HAppendix B Electronic boards and schematics...............................................H214

HAppendix C Service parts ..................................................................................H215

Preface

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Introduction

Welcome to Nucline SPIRIT DH-V, an up-to-date digital gamma camera system ideally suited for planar static, dynamic as well as SPECT and whole body imaging applications with high patient throughput requirements. To extend the usefulness of Nucline SPIRIT DH-V, the system includes the optional ECG gated acquisition capability which allows performing gated cardiac planar and gated cardiac SPECT studies.

To enhance system features toward higher resolution imaging, Mediso presents the HR detectors option utilizing thinner NaI(Tl) detector crystal, most suitable under gamma photon energies of 200 keV. The Nucline SPIRIT DH-V HR camera has excellent spatial resolution when combined with Low Energy Ultra High Resolution LEUHR collimators.

For image processing facility, as of this time, you can directly connect one or more instances of Medisos Nucline P image processing workstations and a number of image processing workstations marketed by other manufacturers.

Beyond the above standard options the acquisition system can be configured to transfer the acquired studies to multiple networked processing workstations in several other file formats such as Dicom 3.0, Interfile 3.3 and direct file formats supported by a number of other manufacturers' image processing systems.

The open computer architecture of the system allows a choice of computer accessories and peripherals. Refer to Appendix A for a list of accessories.

This manual provides the information you need to use the Nucline SPIRIT DH-V SPECT and whole body system and perform routine maintenance.


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Scope of manual

The Nucline SPIRIT DH-V Acquisition Service Manual contains the following chapters: Chapter 1 SAFETY AND REGULATORY INFORMATION

- describes safety precautions and safety features. Chapter 2 CAMERA OVERVIEW

- contains system overview and the gantry operation modes. Chapter 3 CONSTRUCTION GUIDE

- describes several construction procedures. Chapter 4 SOFTWARE ADJUSTMENT

- contains the BIOS, Windows2000 and Console software installation, the Gantry software upgrade and the result of the driver installation.

Chapter 5 CALIBRATION - describes detector calibration, test procedures and the motion calibrations.

Chapter 6 PERFORM NEMA MEASUREMENT - contains the required NEMA measurements.

Chapter 7 MAINTENANCE - describes the frequent maintenance procedures.

Chapter 8 TROUBLESHOOTING - provides an overview on resolving common system problems.

Appendix A INSTALLATION GUIDE - contains the full DH-V camera installation guide.

Appendix A ELECTRONIC BOARDS AND SCHEMATICS - contains the drawings and description of the electronic boards and schematics.

Appendix C SERVICE PARTS - contains the serviceable parts of the DH-V camera.

Preface

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Text Conventions Used in this Manual

The following conventions are used throughout the manual:

Special keys on keyboards, push-buttons and switches are indicated by bold-faced characters between angle brackets e.g. , , .

Software buttons, called also Soft Keys are indicated by bold-faced characters between rectangular parentheses. e.g. [OK], [Yes], [Cancel].

Names of icons, windows, dialogs, parameters to be selected or typed, system tools, menus and tabs, are indicated by bold-faced characters. e.g. My Computer icon, Perfusion Review screen, 30 s time, Scroll Data drop-down menu, Dual Scroll Tool, DICOM Tab.

System messages are indicated by bold-faced, Courier New characters. e.g. Press Y to continue.

System parameters whose actual values must be defined by the user are indicated by bold-faced italic characters. e.g. Type-in the Patient ID.

Words are emphasized in italic characters to stress their importance. Hyperlinks are indicated by blue-faced characters.

WARNING This sign denotes important warning that is to be obeyed to eliminate the risk of personal injury or an incorrect clinical diagnosis.

CAUTION Denotes important information to avoid serious system errors or equipment damage.

NOTE Additional information for reader understanding or simplification of a task.

IMPORTANT It refers to other important information.

All labels relating to Safety appear in HChapter 1 HSafety and Regulatory Information. Read this section before any attempt is made to operate the system.


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Chapter 1. Safety and Regulatory Information

1.1 General Safety 1. The safety of both patients and operators has been a major consideration factor during

the design of this equipment. With proper use and care, it will perform safely and reliably. Misuse, however, may result in personal injury or equipment damage.

WARNING Do not operate the system until you have read and understand the safety precautions described in this chapter. The instructions in this manual are provided for your benefit. Be sure to read them before operating this equipment, and retain the equipment's manuals for future reference.

2. The system has been designed to meet all the safety requirements applicable to medical equipment. However, anyone attempting to operate the system must be fully aware of potential safety hazards.

3. There are no user serviceable parts in this system. The product should be installed, maintained and serviced by qualified service personnel according to procedures laid down in the product service manuals.

4. The system in whole or in part should not be modified in any way without prior written approval by Mediso Medical Imaging Systems. Do not defeat any safety feature of the system.

5. The manufacturer or vendor of the equipment makes no representation, however, that the act of reading this manual renders the reader qualified to operate, test or calibrate the system.

6. The images and calculations provided by this system are intended as tools for the competent user. They are explicitly not to be regarded as a sole incontrovertible basis for clinical diagnosis. Users are encouraged to study the literature and reach their own professional conclusions regarding the clinical utility of the system.

7. The user should be aware of the product specifications, system accuracy, and stability limitations. These limitations must be considered before making any decision based on quantitative values. In case of doubt, please consult your sales representative.

8. Unauthorized personnel should not be allowed access to the system. The owner should make certain that only properly trained, fully qualified personnel are authorized to operate the equipment. An authorized operators list should be maintained.

9. It is important that this manual should be kept at hand, studied carefully and reviewed periodically by the authorized service personnel.

10. When installing a collimator, ensure the collimator is properly mounted by turning the collimator lock into the locked position.

11. The flood source, filled with radioactive isotopes or compounds, gives off hazardous radiation. Safe and proper handling techniques as well as local radiation protection procedures should always be observed when using the flood source. Provide appropriate shielding for the filled source when not in use.

12. Do not operate the system any further if a problem occurs with a mechanical control device (e.g. joystick, ENABLE button, Emergency Stop knob).

Safety and Regulatory Information


13. Power failures that interrupt power to the detector electronics can adversely affect the detectors condition. If it occurs for a time period exceeding 30 minutes, perform the uniformity test to see whether the detector maintained the uniformity following the power failure. For details, see H5.3.1 HIntrinsic uniformity test.

14. Electrical Fire - Conductive fluids that seep into the active circuit components of the system may cause short circuits that can result in electrical fires. Therefore, do not place any liquid or food on any part of the system. To avoid electrical shocks or burns caused by the use of wrong type of fire extinguisher, make sure that only fire extinguisher approved for use on electrical fires are used.

15. Explosion Hazard - Do not operate the equipment in the presence of explosive liquids, vapors or gases. Do not plug in or turn on the system if hazardous substances are detected in the environment. If hazardous substances are detected after the system has been turned on, do not attempt to turn off or unplug the system until the area has been evacuated and ventilated.

16. Overheating - Do not block the ventilation ports of the electronic equipment. Always maintain at least 6 inches (15 cm) clearance around the ventilation ports to prevent overheating and damage to the electronic hardware.

1.1.1 Electrical Safety

Nucline SPIRIT DH-V is Class I Type B equipment designed to comply with IEC 60601-1 (EN 60601-1) electrical safety and IEC 60601-1-2 (EN 60601-1-2) electromagnetic compatibility regulations.

1.1.1.1 Safety Requirements

WARNING Manufacturer approves the electrical safety of this equipment only if the following requirements are being observed:

1. Connect the equipment's AC power plug only to wall outlets with protective earth connection. The earth grounding line of the wall outlet must be connected to a properly earth grounded receptacle. The neutral side of the power line is not to be considered as grounding.

2. If the camera room is equipped with a grounded network: Use separate conductors to connect the grounding connector on the back of the Nucline SPIRIT DH-V Electronics Rack and the grounding connector on the back of the gantry to the common node of the grounded network in the room. To locate the grounding connector on the back of the electronics rack, refer to HFigure 10 HBack side of console computer.

NOTE Two suitable insulated copper cables of minimum 6 mm diameter are supplied with the system as standard accessory.

3. For external connections, in order to maintain electrical safety, only the peripherals listed below, or others subsequently approved by Mediso Medical Imaging Systems, may be powered directly from the two output AC sockets (marked by the "TO ACCESSORIES" label) on the Nucline SPIRIT DH-V Electronics Rack. To locate the two isolated output AC sockets on the back of the electronics rack, refer to HFigure 10 HBack side of console computer.


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Rating USA Wall Plug European Wall Plug

Current 12 A 6 A

Voltage 115 VAC 230 VAC

Cable diameter 0.5 inch (12 mm) 12 mm

Approvals UL: Hospital Grade or UL: Hospital Only

Meets local current and voltage ratings

The total current from the two output AC sockets should be less than 2A. Other peripherals connected to the system shall be independently powered and grounded.

4. Refer all servicing to electrical engineers qualified by the manufacturer. Do not change internal components, such as computer interface cards in the acquisition system. Do not install new hardware, such as computer interface cards into the acquisition system.

1.1.1.2 Prevention of Electrical Hazards

Do not place objects containing liquid on the electronics cabinets. Do not spray aerosols or liquids on the equipment. Liquids or accidental spills entering the detector, gantry or other electronics cabinets can produce an electrical hazard.

Do not remove enclosure panels to clean the internal parts of the system. Place electrical cords and cables in locations where they will not be stepped

on. Keep air vents for the detector, electronics cabinet, and gantry free of

obstructions. Insufficient air flow can produce overheating that damages electrical components.

WARNING Failure to provide an adequate earth ground circuit can result in a shock hazard which can cause serious personal injury. Only properly trained personnel should be permitted access to any internal part of the equipment. Live electrical terminals and components inside electronics cabinets can present a shock hazard and can cause serious or fatal injury.

Maintenance and service routines beyond those mentioned in this manual must be referred to service personnel authorized by the manufacturer. In the absence of appropriate instructions in this manual do not attempt to make service work on the equipment.

When this equipment is interconnected with other electrical appliances in its normal operation, it is important, that these other appliances also be provided with adequate grounding protection. Faults occurring in any interconnected appliance can degrade the safety of this product.



1.1.1.3 Handling Danger Situations

Even with proper use and care, accidents can happen. In case electrical hazards or unforeseen events occur that can present danger, such as

liquid is spilled or object is dropped into the system, cables get cut, broken or cable insulation damaged, smell of burning or smoke comes from the system, do the following:

1. Switch off the Main Power Switch located at the lower left corner on the back door of the Gantry, or remove the power plug of the Electronics Rack from the wall outlet or uninterruptible power supply (UPS).

2. Notify your service representative or the Mediso Medical Imaging Systems office of the accident.

1.1.2 Mechanical Safety

All moveable assemblies and supporting structures should be operated with care and routinely inspected. Any collision which could damage the equipment, worn components, unusual noises or difficulties in operation should be reported to the manufacturer's office immediately.

1.1.3 Radiation

This equipment does not generate any hazardous radiation. When using radioactive isotopes or compounds, safe and proper handling techniques should always be observed. If radioactive contamination occurs, use the decontamination agent and method as described in your site protocol to clean the outside of the equipment.


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1.2 IEC Symbols Used

The system may have labels with one or more of the following symbols. These symbols indicate the IEC standards to which the system conforms.

Symbol IEC Standard

Alternating Current

Protective Earthing Point

ON / Power ON

OFF / Power OFF

Input Power

Output Power

Functional Earth Ground

Warning, Caution - consult accompanying documents

Electrical Shock Hazard

Wheelie Bin



1.3 Safety Devices

The imaging system has 2 basic types of safety devices:

HEmergency Stop Button - used by the operator to halt the motorized system motions in cases where there is any possibility of danger to the patient.

CAUTION Do not reset the button until the problem that necessitated its use is resolved.

HPreventing Collisions serve to protect against an inadvertent collision or contact between the patient and the detector during imaging procedures.

IMPORTANT The operator must be familiar with the location and operation of all safety devices.

WARNING If there is any possibility of danger to the patient, press the emergency stop button to halt the motion.

IMPORTANT The Safety Devices must be maintained and tested regularly.

WARNING Do not place high activity sources close to an uncollimated detector. Sources greater than 0.5 mCi (18.5 MBq) placed within 0.5 m of an uncollimated detector may cause long term image quality defects.


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1.3.1 Emergency Stop Button

1.3.1.1 Using the Emergency Stop

IMPORTANT

Use the emergency stop switches to stop all gantry, detector and imaging table motions in case of emergency.

The Emergency Stop button disconnects power to the motors controlling movement, and all motions stop quickly. The gantry display will indicate the EMERGENCY status in the MODE: field.

To activate the Emergency Stop, depress the Emergency Stop button fully until engaged. Each switch stays depressed until reset, as described below.

Use the emergency stop switches to stop all gantry, detector and imaging table motions in case of emergency. Emergency stop switches disconnect power to the motors controlling movement, and all motions stop quickly. The gantry display will indicate the EMERGENCY status in the MODE.

To activate Emergency Stop, depress an emergency stop switch fully until engaged. Each switch stays depressed until reset, as described below.

All emergency stop switches are red-colored and are located:

on the handcontroller (E-STOP button) (HFigure 5 HHandcontroller) on the gantry (E-STOP knob) (HFigure 1 HGantry with 2 detectors assembled) on the acquisition console (E-STOP knob) (HFigure 2 HAcquisition console) on the back panel of the imaging table (E-STOP knob) (HFigure 3 HImaging

table with head holder assembled)

1.3.1.2 Resetting the Emergency Stop switches

Once engaged, the emergency stop switches must be reset before normal camera operation can be resumed.

If Emergency Stop was activated using an E-STOP knob, turn the knob in the clockwise direction until limit and release. The knob will relocate to unlocked position.

If Emergency Stop was activated using the E-STOP button on the handcontroller, depress and release the E-STOP button again to reset the button.

CAUTION Do not reset the button until the problem that necessitated its use is resolved.

1.3.2 Preventing Collisions

Nucline SPIRIT DH-V systems are equipped with collision detect sensors, which are located on the front plane of the collimator. If collision is detected by the sensor plate,



all gantry motions stop to prevent the hazards of personal injury or equipment damage. However, collisions can occur in spite of this safety feature.

Use increased care to prevent collisions in the following cases:

Positioning in MANUAL OVERRIDE mode. Collision detect is disabled when the system is in MANUAL OVERRIDE mode. To a greater extent, it is the operator's responsibility to ensure that the gantry does not contact the patient or other equipment in MANUAL OVERRIDE mode.

Preprogrammed motions. The gantry and detector will automatically move to a predefined position during preprogrammed motions. Ensure that no obstruction is present on the anticipated motion path of the selected preprogrammed motion Do not start a preprogrammed motion if the patient is on the imaging table.

Acquisitions utilizing computer controlled motions. The gantry and detector will automatically move along the defined motion path during whole body and SPECT acquisitions. Before SPECT and whole body acquisitions, it is important to manually run the detector along the motion path to ensure that sufficient clearance from the patient and imaging table is kept at all positions. Vigilantly watch the patient during computer controlled motions so that you may intervene if necessary.

Special patient positions. Patient is more exposed to collision situations when they cannot lie flat, have an arm extended or are connected to other external medical equipment.

General principles:

CAUTION Ensure a qualified operator is always present when the patient is on the imaging table. Watch the patient vigilantly while the gantry is in motion.

Use manual positioning instead of preprogrammed motions if the patient is on the imaging table.

Position the patient, imaging table and gantry carefully before starting acquisitions which utilize computer controlled motions. Verify by manual control that the defined settings ensure unobstructed motion of the detector and gantry.

Automatic (computer controlled, preprogrammed) motions can be halted immediately by pressing any button on the handcontroller. Press any button on the handcontroller to stop an automatic motion, if collision danger is impending due to the patient's accidental movement or an incorrect gantry position. Make sure the obstruction is cleared before restarting an acquisition.

In case of emergency, push one of the red colored Emergency Stop (E-STOP) switches at the following locations:

Red E-STOP button on the handcontroller (HFigure 5 HHandcontroller) Red E-STOP button on the gantry (HFigure 1 HGantry with 2 detectors assembled) Red E-STOP knob on the acquisition console (HFigure 2 HAcquisition console) Red E-STOP knob on the back panel of the imaging table (HFigure 3 HImaging table

with head holder assembled)

By activating any of the E-STOP switches, you interrupt the power line to all gantry motors and imaging table motors, and all motions stop quickly.


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1.4 Patient Safety and Emergency Case

1.4.1 Patient Handling

1. During studies, monitor the patient during the entire scan to ensure that the patient maintains appropriate positioning relative to the Gantry.

WARNING Unintended motion could cause injury. Never leave the patient unattended and always monitor the position of the patient and equipment during scan procedures.

2. Potential Pacemaker Hazard - though the possibility of interference with pacemakers is small, the operator should be alert to such a potential hazard from any equipment using high frequency electrical signals

3. Never exceed the rated load of patient handling devices. 4. The user should be aware of system limitations regarding particularly large or

overweight patients. Please be aware of any particular system limits or safety precautions and labels regarding large or overweight patients. In case of doubt, please contact your vendor.

WARNING Large or overweight patients may encounter difficulties with the physical clearance of the system.

WARNING Never exceed the rated load of patient handling devices - the table rating is 200 kg (440 lb) - as this may cause damage to equipment and possible injury.

1.4.2 Patient Positioning

The operator should:

Always assist the patients with getting on or off the imaging table. Ensure that the patients are positioned securely on the stretcher, and not in danger

of falling. Ensure that patients do not raise their heads or move their bodies during scans. Ensure that obstacles do not interfere with the movement of the imaging table. Ensure that patients are positioned with their heads in the direction of the controls. Advise the patients not to move during the positioning and study procedures. Make sure that the patients arms are positioned appropriately behind their heads

so as not to interfere between the table and gantry while the table is being moved into acquisition position.

WARNING Make sure that any patient connected lines, tubes etc. are long enough to allow for the full travel of the system, without pulling or restricting.



1.4.3 Emergency Case

System operation may be stopped due to power failure or a safety event (something coming into contact with the collision sensors), or the system may be halted by the operator in response to emergency conditions.

In any case, the operator must first ensure that the patient is safely removed using the appropriate removal procedure.

1.4.4 Power Failure Procedure

Unless an uninterruptible power supply (UPS) is installed in the camera system, hospital power failures cause detector and table motions to stop. If a longer power outage is anticipated and the table position prohibits the patient from freely getting off the pallet, do the following:

1. Hold on to the pallet handle, and slowly pull the pallet away from the gantry while using special care that the patient does not collide with the detectors.

2. If the detector radius is too tight to pull the patient all the way out, pull the pallet only until it clears the pallet extend support. Then unlock the imaging table from the floor sockets, and hold on to the table handles. Slide the table itself with increased care to avoid patient injury.

3. Remove the patient.

WARNING Remove the patient carefully, because the pallet is not locked.

1.4.5 When Electrical Power is Restored

The gamma camera detector contains components that are designed to operate on continuous power supply. Power interrupts can adversely affect the detectors condition. If the power to the system is removed for a longer time period (exceeding approximately 30 minutes), it is advisable to perform the uniformity test (described in H5.3.1 HIntrinsic uniformity test) to see if the detector maintained its original condition following the power failure. If the uniformity parameters worsened, perform the energy and uniformity calibration.

IMPORTANT Do not immediately proceed with tests or calibration, after electrical power is restored, but allow sufficient time for the detector to warm up. It is recommended to wait twice the time the power was off.


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1.5 Data Safety

1.5.1 General

Verify and record the patients identification before starting a scan.

CAUTION It is highly recommended to always make a backup of image data in case of possible medium breakdown.

1.5.2 Connectivity

Always verify that the data transferred to another system has been correctly received.

1.6 Safe Operation Guidelines

The detectors move in the closed casing of the gantry, so the motion of detectors does not constitute a hazard point for personal injury.

CAUTION Do not put hands under table top when rotating table around the telescopes axis of rotation.

CAUTION Always check for obstructions before moving the Imaging Table.



1.7 Safety Labels

Type: Nucline Spirit(DHV) S/N.: DH-xxxxxx-V0 Unit: Collimator cart 2/1 Manufactured: 2006 Made in Hungary Medical Diagnostics

0197

Type: Nucline Spirit(DHV) S/N.: DH-xxxxxx-V0 Unit: Collimator cart 2/2 Manufactured: 2006 Made in Hungary Medical Diagnostics

0197

Type: Nucline Spirit(DHV) S/N.: DH-xxxxxx-V0 Power:~230V/50Hz 2400VA Manufactured: 2006 Made in Hungary Class I, Type B Equipment Medical Diagnostics

0197

Type: Nucline Spirit(DHV) S/N.: DH-xxxxxx-V0 Unit: Patient table Manufactured: 2006 Made in Hungary Medical Diagnostics

0197


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Type: Nucline RG TRIGGER S/N.: ECG-xxxxxx Unit: Patient Part Type BF Manufactured: 2006 Manufacturer: Mediso Ltd. Made in Hungary

1022 Budapest Alstrkvsz t 14. Phone: +36-1-399-3030 Medical Diagnostics

LEADS

CR L

N

Type: Nucline Spirit(DHV) S/N.: DH-xxxxxx-V0 Unit: Console Manufactured: 2006 Made in Hungary Class I, Type B Equipment Medical Diagnostics

0197

1.8 Regulatory Information

1.8.1 Standard Compliance

The equipment complies with the IEC 601-1 standard. It is classified as Class 1 Type B equipment, Mode of Operation: Continuous.

This equipment generates and can radiate radio frequency energy. The equipment may cause radio frequency interference to other medical and non-medical devices and to radio communications. To provide reasonable protection against such interference, the camera complies with the emission limits for a Group 1, Class A Medical Devices as stated in EN 60601-1-2.

The manufacturer is not responsible for any interference caused by using other than recommended interconnect cables or by unauthorized change or modifications to this equipment.

Unauthorized change or modifications could void the users authority to operate the equipment.

Do not use devices which intentionally transmit RF signals (cellular phones, transceivers, or radio-controlled products) in the vicinity of this equipment as it may cause performance outside the published specifications. Keep the power to these types of devices turned off when near this equipment.

The medical staff in charge of this equipment is required to instruct technicians, patients, and other people who may be around this equipment to fully comply with the above requirement.



To comply with the regulations on electromagnetic interference for a Group 1, Class A Medical Device, all interconnect cables to peripheral devices must be shielded and properly grounded. Use of cables not properly shielded and grounded may result in the equipment causing radio frequency interference in violation of the local regulations.

Due to installation in less favorable environment, this equipment may be exposed to electromagnetic and electrostatic interference. To ensure a high level of reliability when exposed to such interference, this equipment complies with the immunity requirements as stated in EN60601-1-2 for immunity Class 1. The operating conditions are classified on the basis of performance criteria as defined in IEC 801-2.

The camera has parts (WEEE), which must not get into the waste. Therefore at final removal the camera must be disassembled, and its parts must handle accurately. The Mediso takes over this disposal process free of charge, if you carry back the camera into its depot.

(Wheelie bin)

1.8.2 USA Regulations

CAUTION Federal US law restricts this device for sale by of the order of a physician.

In the USA, this system should only be used with FDA-approved radiopharmaceuticals.


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Chapter 2. Camera overview

2.1 General description

The DH-V gantry is designed to support and position two gamma camera detector heads weighing 600 kg each.

The detector heads can move relative to each other. You can move them in and out to or from center of rotation (COR) and rotate them around the COR.

A motor moves them to be able to change detector radius. Another motor moves the gantry ring around the COR to be able to change the rotation angle of detectors (HFigure 8 HDetector motions convention and range).

2.1.1 System components

2.1.1.1 DH-V gantry

Figure 1. Gantry with 2 detectors assembled

Detectors

Emergency Stop Switch

Camera overview


2.1.1.2 Acquisition console

Figure 2. Acquisition console

2.1.1.3 Imaging table

Figure 3. Imaging table with head holder assembled

17 TFT color monitor

Keyboard

Mouse


Nucline Electronics Rack


Head holder (optional)

Telescopes


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2.1.1.4 Nucline Electronics Rack

Figure 4. Nucline Electronics Rack

2.1.1.5 Handcontroller

Figure 5. Handcontroller

CD-ROM reader

Floppy disk drive Front power switch

Reset button

HDD LED

Power LED

Gantry service on Figure 10 Back side of console computer.

E-STOP button

MODE button

MARK button

ERASE button

Ready LED

DRAD buttons (head I and

head II)

GROT buttons

ENABLE button

TABLE buttons

START button

RESUME button

Camera overview


2.1.1.6 Collimator and collimator cart

Figure 6. Nucline SPIRIT DH-V collimator

Figure 7. Collimator cart


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2.1.2 The system connections

The system components you saw in the last chapter have to be connected to each other to work properly. You can find a simplified system block diagram on the next page. In the following you will know how to contact the components to work properly.

Main components of the DH-V gamma camera system:

Gantry (HFigure 1 HGantry with 2 detectors assembled) o Gantry hardware o Gantry computer o Detector heads o Electronics o Handcontroller (HFigure 5 HHandcontroller)

Acquisition console (HFigure 2 HAcquisition console) o Color monitor o Mouse o Keyboard o Nucline Electronics Rack

Imaging table (HFigure 3 HImaging table with head holder assembled) o Telescopes o Motor

Collimator and collimator cart (HFigure 6 HNucline SPIRIT DH-V collimator and HFigure 7 HCollimator cart)

Image processing workstation o Internal CD-ROM o Color monitor o Mouse o Keyboard o Printer o CD-writer o Modem

Additional image processing workstation Other networked computers

Camera overview


GANTRY

NuclineTM SPIRIT DH-V dual-head gamma camera - simplified system block diagram

GANTRY COMPUTER

GANTRY HARDWARE

Hand- controller

Performs motions Reports position info

Controls gantry hardware Allows gantry calibration

DETECTOR 1 ELECTRONICS IMAGE ACQUISITION

WORKSTATION

Converts gamma radiation into electronic signals.

Amplifies signals Determines energy and location of gamma event

DISPLAY color monitor

Keyboard

= standard component = option

ARCHIVING CD writer

ECG module

Ethernet

MODEM software upgrade

internet

HARDCOPY DEVICE - color inkjet printer or - monochrome laser printer - multiformat video imager - color laser printer DETECTOR HEADS

IMAGE PROCESSINGWORKSTATION

INPUT DEVICES keyboard, mouse

Color monitor

Printer

Network

Image manipulation Clinical evaluation

Test evaluation

Digitizes input signals from detector Allows image acquisition setup and image Performs digital distortion corrections acquisition Transfers acquired images to data host via network Allows system settings and calibration Controls digital tuning of detector ADDITIONAL IMAGE PROCESSING

WORKSTATION(S)

Other networked computers

LEGENDS:

DETECTOR 2 ELECTRONICS


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2.2 DH-V Gantry

2.2.1 Gantry hardware

New design, easy-to-install dual-detector gantry based on latest technology

180 and 102 or 90 degree variable angle head positions with high precision positioning

small footprint robust mechanical design with improved safety factor industry standard CAN connected automation computer pre-programmed robotic gantry motions full automatic motion calibrations maintenance-free mechanical design

2.2.2 Gantry computer

2.2.2.1 PC 104

You can find the following buttons, ports, connectors and LEDs on the cover of PC 104:

Reset button PC 104 hardware reset

Serial port In default mode the log messages come to this port.

KBD Keyboard connection (for development)

Green dark, yellow dark Off status

Green dim, yellow dim PC104: boot up phase

Green dark, yellow light Gantry software: boot up phase

Status LEDs

Green light, yellow dark Gantry software: running

2.2.2.2 Virtual Device mode

PC 104 has no own keyboard and monitor, but you can work on the keyboard and monitor of another computer (using the serial port) to PC 104 after running the file named START_CONNECTION.BAT.

How to use Virtual Device mode?

1. Boot console PC using service boot floppy disk. 2. Find the START_CONNECTION.BAT file and run it. (press on it or

double click) 3. The computer tries to connect. 4. RESET PC104 and the connection will be effected.

Camera overview


2.2.2.3 Logging

Gantry sends log messages continually to service serial port (19200,8,1,no flow control). Gantry sends the main status parameters as answer to any character coming in through this serial port.

Press the ++ buttons simultaneously. In this case the log messages will be written in file GANTRY.LOG, too. You can find this file on PC 104 RAM drive (D:\). To quit logging press the ++ buttons simultaneously.

To read more about LOG file creation turn to chapter H4.4.5 HHow to create LOG file.

2.2.2.4 PC 104 main directory (C:\)

Gantry PC main directory always has to contain the following system files:

IBMBIO.COM IBMDOS.COM COMMAND.COM AUTOEXEC.BAT CONFIG.SYS HIMEM.SYS RAMDRIVE.SYS

PC 104 main directory can contain the following utility files (optional):

GLOADER.EXE

PC 104 main directory always has to contain the following application files:

GANTRY.EXE : gantry program PREDEF.DAT : predefined movements PREDEFE.DAT : PROCESS.DAT : Menu structure PROPENTR.DAT : gantry screens PROPLIST.DAT : DR1.CFG : radius 1 servo settings (ASCII) DR2.CFG : radius 2 servo settings (ASCII) GR.CFG : gantry servo settings (ASCII) L123.CFG : lift settings (ASCII) TR.CFG : translate servo settings (ASCII) CAMERA.CFG : global settings (ASCII) COLL_ID.CFG : collimator parameters (ASCII) POS_DEF.CFG : collimator exchange position (ASCII) SERIAL.CFG : serial communication settings (ASCII) *.DAT files can be generated using GantryService program from GANTRY.INI, GANTRY.GSA, S_CPU.TBL, PROPERTIES.TBL files.


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2.2.3 Detector heads

2.2.3.1 Detectors

Two newly developed rectangular jumbo FOV high stability detectors assembled with high optical and mechanical quality

NaI(Tl) scintillation crystal with special assembling case o size: 585 x 470 mm o thickness: 9.5 mm, 15.9 mm or 25 mm (pixelated)

photomultipliers: o 55 pcs of high quantum efficiency PMTs / detector o characterized by improved energy resolution, magnetic o shielding and long-term stability

lead shielding thickness: 12 mm - 32 mm

2.2.3.2 Detector electronics

1 ADC/PMT compact, highly integrated, single-board easily serviceable construction without tuning potentiometers.

dedicated computer controlled PMT auto tuning processor for fast PMT gain stabilization and adjustment

computer controlled ODC ( Optical Distortion Correction ) electronics automatic pre-amplifier offset compensation high precision summation electronics active high voltage bleeder with integrated HV module

2.2.4 Gantry electronics

You can find the necessary drawings of gantry electronics in chapter Appendix.

2.2.5 Handcontroller

(HFigure 5 HHandcontroller)

You use the handcontroller to position the gantry and detector and initiate preprogrammed motions. For direction convention, see the next figure. The handcontroller includes a red button which can be used to stop all gantry motions in case of emergency.

NOTE Computer controlled automatic motions can be halted by pressing any button on the handcontroller. Press any button on the handcontroller to stop an automatic motion if collision danger is impending due to patient movement or an incorrect gantry position.

Camera overview


Figure 8. Detector motions convention and range

Buttons Function (Emergency Stop) Stops all camera motions. Use this button in

case of emergency. Ready LED Shows the system-status. If this LED blinks, the

boot procedure is in progress or a failure could happen during system operations, otherwise if everything is all right the LED lights continuously.

(Gantry rotate) buttons Rotate the gantry ring clockwise or counterclockwise.

(Detector radius) buttons Move detectors closer to ( ) or farther from ( ) the gantry axis of rotation.

buttons Move the imaging table down or up. button Increments the actual selection of available

modes and preprogrammed motions. Selected item is shown in the MODE: field on gantry display.

button Initiates a preprogrammed motion that was previously selected using the button.

, and buttons Implement various functions in Gantry Calibration Mode, but have no effect in the normal state of the gantry.

button A new window appears on your display, which shows the actual gantry status and adjustment.

button Allows slow or fast motions when pressed simultaneously with one of the motion buttons. (Press only once, this is the slow motion, press twice will be the fast motion.)

++ You get to Service Mode. ++ Resets PC 104.


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WARNING DO NOT use in fast mode for fine adjustment if the detector is close to the patient or other equipment.

Gantry and detector motion definitions

Motion Zero position Min. Max. Resolution SLOW speed

FAST speed

Rotate detector 1 on the bottom horizontal

position

-10 +370 0.1 100-110 /min

230-240 /min

Radius* gantry centre of rotation (COR)

+14,5 cm +32cm 0.1cm 0,2 cm/sec 1 cm/sec

+66cm ** +92cm ** Table Height

floor level

+cm *** +92cm ***

0.1cm 0,3 cm/min

1,2 cm/sec

Pallet Translate

Pallet pulled out by 0 cm

0cm +200cm 0.1cm - -

* Radius is measured from the gantry COR to the face of the collimator, ** when pallet reaches into gantry ring *** when pallet is fully out of gantry ring

Table 1. Nucline DH-V motions

2.3 Acquisition console

2.3.1 Color monitor

What kind of monitor can you connect?

Mediso local distributor supports a 17 TFT color monitor with acquisition console assembled. You have to use CE and UL certificated monitor.

How to install the monitor?

At the beginning you get an installed monitor with your acquisition console. If you change your monitor to another, you have to make the hardware and software installation.

a. Hardware installation If you buy a new mouse, in the package you can find a Users Guide that helps you to install the new system item. If you do not have this Users Guide, do the following.

NOTE Always turn off your computer before you connect or disconnect your monitor.

o Connect your monitor to the VGA card installed in console computer (Nucline Electronics Rack).

o Turn on your computer.

Camera overview


b. Software installation 1. Insert the monitor software diskette into drive A or CD in CD-ROM drive. 2. Start Windows Explorer from Start menu > Programs. Browse the drive you

placed in the diskette or CD. 3. If you find the program named SETUP.EXE, click on this file two times or click

on and press 4. Follow the instructions on the screen, and when the installation is complete,

restart your computer.

2.3.2 Mouse

What kind of mouse can you connect?

With the acquisition console Mediso supports you a mouse that is connected to console computer. That is a Genius Netscroll + PS/2 mouse.* If you have any problem with your mouse you can change it to a new one.

* subject to change

How to install the mouse?

At the beginning you get an installed mouse with your acquisition console. If you change your mouse to another, you have to make the hardware and software installation.

a. Hardware installation If you buy a new mouse, in the package you can find a Users Guide that helps you to install the new system item. If you do not have this Users Guide, do the following.

NOTE Always turn off your computer before you connect or disconnect your mouse.

o Connect your mouse to the 6-pin PS/2 port on your computer (Nucline Electronics Rack).

o Turn on your computer.

b. Software installation 1. Insert the MouseMate 98-NetScroll+ software diskette into drive A. 2. Open the Start menu (or press + simultaneously), and select

Run. 3. Type A:\SETUP in the command line box and select OK 4. Follow the instructions on the screen, and when the installation is complete,

restart your computer.


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2.3.3 Keyboard

What kind of keyboard can you connect?

Mediso supports a 101 buttons keyboard with acquisition console. You have to use CE and UL certificated keyboard.

The default keyboard type is CHERRY with the following identifications: Typ. 35

Part number: G83-6104LPNUS/ 00

How to install the keyboard?

At the beginning you get an installed keyboard with your acquisition console. If you change your keyboard to another, you have to make the hardware installation.

a. Hardware installation If you buy a new keyboard, in the package you can find a Users Guide that helps you to install the new system item. If you do not have this Users Guide, do the following.

NOTE Always turn off your computer before you connect or disconnect your keyboard.

o Connect your keyboard to console computer (Nucline Electronics Rack). o Turn on your computer.

Keyboard functions:

Key Function

List options Controls the list feature of various fields in the data entry forms. Lists predefined options for the active field.

Display mode Controls which detector is displayed by incrementing the following options: Single 1, Single 2, Dual.

Proceed or Start Advances to the next level within a menu (e.g. to the next data entry form) or starts the acquisition of image data.

+ Next segment - Advances to the next parameter set of a protocol string.

+ Stop and Save - Stops image acquisition and saves image data.

Orientation Changes image orientation on the screen.

Freeze/Resume Toggles between freezing the image viewport and allowing it to accumulate.

+ Marker mode This mode allows you to enter anatomical markers in the image while at the Study Setup Form.

Refresh rate Cycles the automatic refresh rate between 2, 4, 6, 8, 16, 32 or INF (infinite) seconds.

Monitor/Spectrum Toggles display mode between the image display and the display of the energy spectrum.

Camera overview


As a result of pressing a GIF image from the acquisition field will be created. You can use this function anywhere in the menu.

+

Stop and Discard Pressing + during an acquisition allows you to stop the acquisition without storing the data already acquired. This is useful for obtaining information from the status indicators, such as the count rate information field, that are displayed in the lower part of the screen during acquisitions.

+ R-R diagram - Toggles display mode between the image or spectrum display and the diagram of the patient's heart rate in gated cardiac studies.

+ / -

Window You can change the centerline and window width values either by entering numbers directly into the fields or by using the +(plus) or -(minus) keys to increase or decrease the current values by one (Simultaneously pressing and + or and increases or decreases the value by ten).

+ As a result of pressing + a GIF image from the total display will be created. You can use this function anywhere in the menu.

+ As a result of pressing + you will be able to choose an image display from the list of the earlier performed acquisitions.

+ As a result of pressing + a hair-cross is appears in the display.

2.3.4 Nucline Electronics Rack Nucline Electronics Rack (HFigure 4 HNucline Electronics Rack) is a part of acquisition console assembly. The computer contains the following parts:

1. Computer housing Front power switch Power LED HDD LED Reset button

2. Motherboard CPU System memory

3. VGA card 4. Ethernet card 5. ECG card 6. QAD 1 and QAD 2 cards 7. DVD-ROM reader 8. Floppy disk drive


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2.3.4.1 QAD cards

QAD cards are assembled in the Nucline Electronics Rack. There are two QAD cards in a Rack: QAD 1 and QAD 2. These cards transform the incoming analog signals to digital signals.

Figure 9. QAD 1 and QAD 2 cards and connections

Camera overview


2.3.4.2 Back panel connections

Figure 10. Back side of console computer


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2.4 Imaging table

2.4.1 Telescopes

2 telescopes lift up and let down the imaging table. 4 bolts fix them both to the bed and to the bed-foot.

CAUTION These bolts are screwed in aluminum, so you have to use a decreased momentum of 40 Nm.

Screwing/unscrewing 4 other bolts you can make parallel the three telescopes.

Telescopes are connected to an unstabilized voltage of 24V, and get a max. 6A current. They are equipped with encoder and weigh 400 kg (882 lbs) each. The max. amplitude they can accomplish is 300 mm.

2.4.2 Motor

The pallet moves relative to the bed-telescopes from or towards the gantry. This is a horizontal motion, and the amplitude of this movement is 2000 mm.

Figure 11. Nucline DH-V imaging table

Telescope Pallet moving motor

Camera overview


2.5 Collimators and collimator carts

2.5.1 Collimators

Nucline SPIRIT DH-V collimators consist of a honeycomb structured lead core with a support frame. Since, in this geometry, the holes are perpendicular to the detector plane, the gamma radiation transmitted produces a parallel projection on the detector.

Collimators are available for different energy ranges and resolutions. Always install a collimator corresponding to the energy of the radionuclide you use, otherwise the imaging performance of the system will not be optimal.

The following table contains the specification for the available collimators:

name hole

length [mm]

hole size [mm]

septal thickness

[mm]

nominal energy [keV]

septal penetration at nominal energy [%]

geometric/ system

resolution at 10 cm

[FWHM mm]

geometric/ system

sensitivity [cpm/Ci]

7%

LEGP(1) 35 1.9 0.2 140 1.10 8.2 / 8.9 320 / 260(7)

LEHR(2) 35 1.5 0.16 140 1.00 6.5 / 7.4 180 / 150(7)

LEUHR(3) 40 1.4 0.16 140 0.40 5.4 / 6.5 133 / 100(7)

MEGP(4) 35 2.5 1.2 300 1.9 11.1 / 11.6 330 / 200(8)

HEGP(5) 55 3.4 1.6 364 5.9 11.6 / 12.2 340 / 75(9)

HEPH(6) 200 3 / 4 / 6 - 364 - 3.9 / 4.8 / 7.4* 1080 / 290(7)

(1) Low Energy General Purpose collimator Mediso 09/2005. Specifications are subject to change. (2) Low Energy High Resolution collimator (3) Low Energy Ultra High Resolution collimator (4) Medium Energy General Purpose collimator (5) High Energy General Purpose collimator (6) High Energy Pinhole collimator (7) Measured with 99mTc-in 20%-window (8) Measured with 131I-in 20%-window (9) Measured with 67Ga-in 20%-window

2.5.2 Collimator carts

Collimators are heavy in addition to being fragile. Collimator exchange is aided by a mobile storage rack (collimator cart). Each collimator cart allows the storage of two collimators. Collimators are suspended on the four support studs of the cart. Automatic safety locks prevent collimators from slipping off the cart.


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2.6 Gantry Operation Modes

Browsing in menu system you have the opportunity to choose a menu item and start a predefined motion. In Normal Mode you can generally do the following: to step on the next menu item you have to push the button on the handcontroller and to choose and run the displayed motion you have to push the button. Normal modes are: Manual Mode and Collision Override mode if collimators are not equipped.

Several problems could occur during system operation that can halt and restrict preprogrammed motions. It could happen because of hardware failure, power failure, incorrect manipulation of the apparatus or as a result of the administrators activity. In case of breaking off the motions the MODE: field on your display will change. Into the modes named Error Mode, Emergency Mode, Collision Mode, Service Mode and if you had a collision with equipped collimators, after pushing the button you get the Collision Override mode.

If the problem is more difficult, it is possible that you have to solve the problem using Service Mode.

2.6.1 Normal Mode

Figure 12. Normal Mode

You can get to Normal Mode:

From Collision Test Mode after you press both of Collision Plates. This is the default mode.

Camera overview


You can start the following procedures from Normal Mode:

Manual Home Remove patient Heart Exam Brain Exam Collimator 1 Exchange Collimator 2 Exchange (Optional PREDEF) You can reach from Normal Mode:

Collision Override Mode if you do not install collimators You can start the following procedures from Collision Override Mode:

Collimator 1 Exchange Collimator 2 Exchange Quality Control 1 Quality Control 2 After collimator installation you get to Collision Test Mode.

2.6.2 Collision Mode

Figure 13. Collision Mode

You can get to Collision Mode:

After the touch plate of the collimator contacts another object.


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You can start the following procedures from Collision Mode:

Collision Override Mode To exit Collision Mode press the button on the handcontroller and you will get to Collision Override Mode. You have to remove the object or if nothing touches the surface of touch plate press the button. If everything is all right after pressing the button you will get to Normal Mode. If the collision exists yet, you get to Collision Mode again until you do not remove the object from touch plate.

2.6.3 Emergency Mode

Figure 14. Emergency Mode

You get to Emergency Mode:

After you pushed the Emergency Stop button on gantry, acquisition console or imaging table.

To leave this mode:

You have to release the specified Emergency Stop button.

Camera overview


2.6.4 Service Mode

Figure 15. Service Mode

You can read more about Service Mode in chapter Hiba! A hivatkozsi forrs nem tallhat.


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2.6.5 Calibration Mode

Figure 16. Calibration Mode

You can get to Calibration Mode:

From Service Mode (if you choose Calibration and press button on the handcontroller.)

To get to GR Calibration circle:

You have to choose GR Calibration and press . To return to Calibration Mode:

Choose Calibration and press . You can read more about Calibration Mode in chapter H5.5.3 HCALIBRATION.

Camera overview


2.6.6 Error Mode

Figure 17. Error Mode

You get to Error Mode:

If a hardware or software error occurs. After solving the problem you have to press the button on the handcontroller to get back to Normal Mode.


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Chapter 3. Construction guide

3.1 Changing radius motor timing belt You need the following tools: crank Allen wrench Screwdriver

Crank Allen wrench Screwdriver

1. Rotate the detectors in 0 position Rotate detector heads in 0 position using handcontroller. If you are not able to use handcontroller, screw the spindle by hand using a crank you got from Mediso (HFigure 19 HCrank-hole and fixing screws of detector housing cove).

Figure 18. 0 degrees detector position

Construction guide


Figure 19. Crank-hole and fixing screws of detector housing cover

2. Move the detectors out Move detectors to max. radius position using handcontroller. If you are not able to move them by software, screw off the spindle by hand using an Allen wrench you got from Mediso (HFigure 22 HRemoving bearing housing cover).

3. Break the power supply towards gantry Break the power supply system towards gantry by turning off the console computer. (Shut down the console computer or push Emergency Stop button.)

a) b)

Figure 20. a) Console computer turned on b) Console computer turned off

4. Remove detector-housing cover Remove detector-housing cover (next figure) screwing off 4 pieces of M4 bolts, assembled to detector frame (HFigure 19 HCrank-hole and fixing screws of detector housing cover HCrank-hole and fixing screws of detector housing cove). You have to pull the detector housing carefully towards yourself.

CAUTION Consider that a grounding cable is connected to the detector housing cover. In order to save the intact of this cable unconnect it before you pull out the detector housing cover totally.

Crank hole

Holes of detector housing fixing screws


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Figure 21. Detector housing cover and the detector with housing cover removed

5. Remove the bearing housing cover Remove the bearing housing cover screwing off 4 pieces of M4 Pan Head Cross Recess bolt.

Figure 22. Removing bearing housing cover

6. Dissolve electronic connection to motor and encoder

Pan Head Cross Recess bolts

Modifying detector radius by hand

Construction guide


7. Unscrew the belt tension bolt Unscrew the belt tension bolt until the belt gets loose.

Figure 23. Loosing belt tension bolt

8. Remove motor holder Remove motor holder unscrewing 4 pieces of M8 bolts.

Figure 24. Removing timing belt

Belt tension bolt

M8 bolts


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Figure 25. Radius motor timing belt

9. Tip the motor Tip the motor to be able to remove the belt (HFigure 24 HRemoving timing belt).

10. Install timing belt Install the new timing belt (HFigure 25 HRadius motor timing belt).

11. Fix the motor holder screws 12. Screw the belt tension bolt

Screw the belt tension bolt until you set the right belt tension. 13. Reconnect motor- and encoder electronics 14. Recover the power supply towards gantry

Reconnect the power supply and restart the computer or release Emergency Stop button to test the whole system. If anything does not work properly, verify the cable connections again.

CAUTION Until the detector housing cover is not replaced do not touch any electronics parts of detector head without breaking the power supply circuits towards gantry. During the test of system do not touch any moving parts of detector head (for example: parts been in rotation).

15. Install bearing housing cover 16. Install detector housing cover

Install detector housing (VG-00-00-01) screwing in 4 pieces of M4 bolts assembled to detector frame.

Construction guide


3.2 Changing radius motor

The procedure of radius motor changing is similar to timing belt changing described in chapter H3.1 HChanging radius motor timing belt until you reach step 8. After step 10 the procedure is the same again.

Figure 26. Radius motor

1. See in chapter H3.1 HChanging radius motor timing belt, points 1-8. 2. Install the new motor and replace the timing belt. 3. See in chapter H3.1 HChanging radius motor timing belt, points 10-14.

3.3 Changing radius servo amplifier

You need the following tools:

crank Allen wrench Screwdriver


1. Rotate the detectors in 0 position Rotate detectors in 0 degrees position using handcontroller (HFigure 18 H0 degrees detector position). If you are not able to use handcontroller, screw the spindle by hand using a crank you got from Mediso (HFigure 19 HCrank-hole and fixing screws of detector housing cover).


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2. Break the power supply towards gantry Break the power supply system towards gantry by turning off the console computer. (Shut down the console computer (HFigure 20 Ha) Console computer turned on b) Console computer turned off) or push Emergency Stop button)

3. Remove detector-housing cover Remove detector-housing cover (HFigure 21 HDetector housing cover and the detector with housing cover removed) screwing off 4 pieces of M4 bolts assembled to detector frame (HFigure 19 HCrank-hole and fixing screws of detector housing cover). You have to pull the detector housing carefully towards yourself.

CAUTION Consider that a grounding cable is connected to the detector housing cover. In order to save the intact of this cable unconnect it before you pull out the detector housing cover totally.

4. Remove electronic contacts to servo amplifier Remove electronic contacts to the servo amplifier. First of all the one that is signed by 24V IN.

5. Screw off servo fixing bolts Screw off 2 pieces of servo fixing M4 bolts, and loose the two other one.

6. Remove radius servo amplifier Remove the old radius servo amplifier.

7. Install a new radius servo amplifier 8. Reconnect electronic contacts to the new servo amplifier 9. Fix the new radius servo amplifier

Screw in 4 pieces of servo fixing M4 bolts. 10. Recover the power supply towards gantry

Reconnect the power supply and restart the computer or release Emergency Stop button to test the whole system. If the new servo amplifier does not work properly, verify the cable connections again.

CAUTION Until the detector housing cover is not replaced do not touch any electronics parts of detector head without breaking the power supply circuits towards gantry. During the test of system do not touch any moving parts of detector head (for example: parts been in rotation).

11. Install detector housing cover Install detector-housing cover screwing in 4 pieces of M4 bolts assembled to detector frame.

Construction guide


3.4 Changing gantry rotate motor timing belt

You need the following tools:

crank Allen wrench Screwdriver


1. Rotate the detectors in 315 position Rotate detectors to 315 degrees position using the handcontroller. If you are not able to use handcontroller, screw the spindle by hand using a crank you got from Mediso (HFigure 19 HCrank-hole and fixing screws of detector housing cover).

2. Break the power supply towards gantry Break the power supply system towards gantry by turning off the console computer. (Shut down the console computer (HFigure 20 Ha) Console computer turned on b) Console computer turned off) or push Emergency Stop button).

3. Remove gantry electronics cover plate Remove the gantry electronics cover plate placed on the right back side of DH-V gantry.

Figure 27. DH-V detectors in 315 degrees position and gantry electronics cover plate fixing

4. Loose fixing of motor holder plate Loose 4 pieces of motor holder plate fixing bolts (M8).

5. Loose belt tension bolt (M8)

Cover plate fixing bolts


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Figure 28. Removing timing belt

6. Remove timing belt 7. Install new timing belt 8. Set belt tens

Documents

DHR System User Manual