What is CT Colonography?A CT Colonography (or Virtual Colonoscopy) uses X-rays to obtain an interior view of the colon (the large intestine). It does not require sedation. It is also less invasive than colonoscopy which involves insertion of a camera into the colon.
Why do I need it?This study looks for growths, such as polyps or cancers, in the large intestines. Some polyps may grow into cancers. Early detection means these growths can be removed.
During the CT scanThe CT scanner is a large ring-shaped structure. You will lie on an examination table that passes through the scanner. You will not come into contact with the scanner, although it produces some noise as the table moves.
You will be fully awake and required to lie in different positions as gas is introduced into your colon. When the scan starts, you will be instructed to hold your breath for about 15 seconds so as to obtain good scan images.
Your radiographer operates the scanner from the console next to the scan room. He will always be able to see and hear you during the scan.
Preparing for your scanTo get a good look at the lining of the colon, it is necessary to clean out any traces of stool. You will be required to follow a restricted diet for two days before the examination to clear your bowel.
The following medications may also be required for your CT Colonography:
Two days before procedureFollow our recommended diet to clear your bowel for accurate diagnosis.
On the day of the scan
After the scanThere are usually no restrictions after having a CT scan. You may resume your normal activities unless advised otherwise by the radiographer or your doctor.
Your images will be read and interpreted by radiologists, who are doctors specialised in imaging. They will send your results electronically to your clinician who will discuss them with you at your next appointment.
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