Multi slice ct ppt

MULTI-SLICE CT

Prepared by, Anand and Shonima

MULTI-SLICE AQUISITION

• 4 slice since 1999

(GE, Siemens, Philips, Toshiba)• 8 slice since 2001

(GE)• 16 slice since 2002

(GE, Siemens, Philips, Toshiba)

MAIN PARTS Generator• High voltage generator 60 kw out put

X-ray tube• Rotating anode tube• Very high heat capacity

Detector• Solid state detector

DIFFERENCE

LIMITATIONS OF SINGLE SLICE CT

• Speed performance• MPR low accuracy• image quality and artifacts• More intravenous contrast

ADVANTAGES

• Improved spatial resolution.• Motion artifacts reduced.• Patient breath hold is much less demanding.• Imaging larger z-axis volume in less time.• Less contrast medium required.• Improved accuracy in needle placement CT

fluoroscopy.

ARTIFACTS IN MULTI-SLICE SCANNING

• Motion artifact reduced by faster scanning.• Stair-step artifacts in 3D reconstruction

reduced by using thinner slices.• Partial volume artifacts reduced by using

thinner slices.

DETECTORS IN MULTI-SLICE

NEW CT TECHNOLOGY

MANUFACTURERS

TECHNICAL SPECIFICATION

DETECTOR DESIGN

Major impact areas for multi-slice ct

• The multi-slice technique has added new possibilities for faster, better and safer evaluation of many different disease

Stellar detector

• The stellar detector provide ultra-thin slices.

• very high spatial resolution

• It significantly reduces electronic noise for uncompromised diagnostic outcome at a low dose.

cost

videos

• https://www.youtube.com/watch?v=7aJKIq3MXa8

• https://www.youtube.com/watch?v=NicQmZxWeRo

THANK YOU