COMPUTED TOMOGRAPH

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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