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Virtual colonoscopy (VC, also called CT colonography or CT pneumocolon) is the use of CT scanning or magnetic resonance imaging (MRI) to produce two- and three-dimensional images of the colon (large intestine), from the lowest part, the rectum, to the lower end of the small intestine, and to display the images on an electronic display device.
Whereas traditional colonoscopy involves snaking a camera called a colonoscope through your colon and rectum, the virtual option consists of X-rays and a computer creating 3D images of these organs.
Colonoscopy (/ ˌkɒləˈnɒskəpi /) or coloscopy (/ kəˈlɒskəpi /) [1] is a medical procedure involving the endoscopic examination of the large bowel (colon) and the distal portion of the small bowel. This examination is performed using either a CCD camera or a fiber optic camera, which is mounted on a flexible tube and passed through the ...
Stay hydrated. On the day before your colonoscopy, you mostly will be on a liquid diet. Although you can't eat solid foods, you can drink your calories and have as many drinks as you want ...
Chromoendoscopy is a medical procedure wherein dyes (often the same stains used in histology) are instilled into the gastrointestinal tract at the time of visualization with fibre-optic endoscopy. The purpose of chromoendoscopy is chiefly to enhance the characterization of tissues, although dyes may be used for other functional purposes.
Endoclip. An endoclip is a metallic mechanical device used in endoscopy in order to close two mucosal surfaces without the need for surgery and suturing. Its function is similar to a suture in gross surgical applications, as it is used to join together two disjointed surfaces, but, can be applied through the channel of an endoscope under direct ...
Proctoscopy, or rectoscopy, is a common medical procedure in which an instrument called a proctoscope (also known as a rectoscope, although the latter may be a bit longer) is used to examine the anal cavity, rectum, or sigmoid colon. A proctoscope is a short, straight, rigid, hollow metal tube, and usually has a small light bulb mounted at the end.
CT scanning can perform a virtual colonoscopy with greater accuracy and less discomfort for the patient than a traditional colonoscopy. [142] [143] Virtual colonography is far more accurate than a barium enema for detection of tumors and uses a lower radiation dose. [144] CT is a moderate-to-high radiation diagnostic technique.