How is a CT Scan Performed? (CT Scan Procedure)
A CT Scan (computed tomography ) or CAT (Computed Axial Tomography) Scan diagnostic method which allows doctors to see anatomy. A CT Scan processes hundreds of X-Rays
and produces cross-section pictures of bones, organs, and other tissues. Having acquired multiple images it is more detailed and than a regular X-ray. CAT Scan is the fast and painless procedure to scan any part of your body.
CT Scan Procedure
A CT Scan is usually done in a hospital or radiology clinic, and is performed by a qualified radiology technologist. The patient may be advised by the guiding medical professional or doctor to abstain from eating or drinking for a few hours before the procedure begins. When it is time for the Test, the patient will be required to lie on a table – usually on the back, though sometimes it may be sideways or face-down as well. The table then starts to make its way slowly inside a large and circular (donut-shaped) CT Machine that contains circling X-Ray beams within. As the body passes through the circle, the X-Ray beams capture a ring-like, cross-sectional image of the ‘slice’ of the body directly in its ‘gaze’ or range. After every ‘X-Ray shot’, the table (on which the patient is lying) will move a bit, enabling the machine to take the next ‘shot’. These shots are subsequently scanned and processed digitally to generate a series of 2D ‘slices’ of the body, each slice providing a detailed image of the bones, tissues, blood vessels and organs. The patient has to remain as still as possible during the scanning process to ensure ‘best results’. When the Scan is the operation, nobody is allowed to be present in the room – with the exception of the patient, of course. During the process, the patient can communicate with the radiologist professional who is conducting the Scan via intercom – and vice versa. A CT Scan can take anywhere between a few minutes to a half-hour at the max, and one can usually return home almost immediately once the procedure has been completed.
How Long Does a CT Scan Take?
A Simple CT Head
(also known as NCCT Head or CT Brain
) typically takes a few seconds inside a multislice CT Scanner and does not require much pre-preparation. More complicated investigations such as CECT Abdomen
(CT Abdomen with Contrast) or CT Triple Phase Abdomen
Phase Abdomen may take hours of pre-preparation including oral and IV contrast administration.