CT Colonography (Virtual Colonoscopy): Technique, Indications and Performance

Hebrew University of Jerusalem, Yerushalayim, Jerusalem, Israel
Digestion (Impact Factor: 2.1). 02/2007; 76(1):34-41. DOI: 10.1159/000108392
Source: PubMed


Worldwide, colorectal cancer is the third most frequent cancer occurring in both sexes. Screening programs for early detection enable detection of tumors at an earlier stage and have been shown to reduce death rate. Currently, colonoscopy is the investigation of choice for colorectal cancer screening and for investigation of patients with suspected colorectal cancer. However, colonoscopy remains an invasive technique requiring anesthesia, with a risk of perforation and bleeding. In addition, even experienced colonoscopists may be unable to complete the colonoscopy due to multiple reasons such as severe diverticulosis, stricture, obstructing mass, or fixation of colonic loops. CT colonography, also known as virtual colonoscopy, is a relatively new technique that is becoming increasingly popular. The technical aspects, indications, advantages and diagnostic performance of this technique are briefly reviewed.

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    • "Despite the current limitations of WCE this new technique has already proven to be an effective diagnostic modality for detecting small bowel tumors and small bowel lesions (Cobrin et al., 2006), and may also become an important tool to detect other abnormalities in the GI tract (El-Matary, 2008). Another recent advance in endoscopy is virtual endoscopy (Bielen and Kiss, 2007; Blachar and Sosna, 2007; Wood and Razavi, 2002) (VE), also referred to as computed endoscopy. This method differs completely from flexible endoscopy and WCE as it is completely non-invasive (apart from insufflating the bowel as a preparation step). "
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