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COMPUTED TOMOGRAPH
Y
1970 Sir Godfrey Hounsfield
HISTORY
BASIC PRINCIPLE ISX-rays are absorbed to different degrees by different tissues
BASIC PHYSICS
Each scan slice is composed of a large number of pixels which represent the scanned volume of tissue. The pixel is the scanned area on the x and y axis of a given thickness.
PIXELS
The tissue contained within each pixel absorbs a certain proportion of the x-rays that pass through .This ability to block x-rays as they pass through a substance is known as “attenuation”. For a given body tissue, the amount of attenuation is relatively constant, and is known as that tissue’s “attenuation coefficient
ATTENUATION COEFFICIENT
Windowing allows the CT reader to focus on certain tissues on a CT scan that fall within set parameters
WINDOWING
HOW THE TEST PERFORMED????
HOW TO PREPARE FOR THE TEST ???
Being exposed to radiationAllergic reaction to contrast dye
THORACIC SPINE CT SCAN
SINUS CT SCAN
SHOULDER CT SCAN
RENAL SCAN
PELVIC CT SCAN
LUMBOSACRAL SPINE CT SCAN
LUMBAR SPINE CT SCAN
LEG CT SCAN
KNEE CT SCAN
HEART CT SCAN
CERVICAL SPINE CT SCAN
ARM CT SCAN
ABDOMINAL CT SCAN
CT SCAN NERVOUS SYSTEM SPECIFICALLY
EPIDURAL HEMATOMA
SUBDURAL HEMATOMA
INTRAPARENCHYMAL HAEMORRHAGE
SUBARACHNOID HAEMORRHAGE
INTRAVENTRICULAR HAEMORRHAGE
MASS LESIONS
TUMOURS
ISCHEMIC INFARCTION
ABCESS
SKULL FRACTURE
MORE IMAGES FOR YOU…!!!!!
ABDOMINAL CT SHOWING SEVERAL CYSTS
ABNORMAL MENINGEAL ENHANCEMENT
ACUTE PANCREATITIS
HEMANGIOMA
ASCITIS
LEFT INTRABRONCHIAL MASS
RIGHT SIDE PLEURAL EFFUSION WITH ATLECTASIS
PERITONIAL METASTASIS OF OVARIAN CANCER
THYROID CANCER TUMOUR
TRACHEAL PERFORATION
WILMS TUMOUR OF RIGHT KIDNEY
CALCIFICATIONS IN THE HEART
NURSING INTERVENTIONS
JOURNAL ARTICLES