Virtual Colonoscopy

Virtual colonoscopy is a promising new screening test for colorectal cancer. It is method to detect tumors and precancerous lesions (polyps) in the colon. Virtual Colonoscopy relies on advances in CT (CAT scan) to produce high quality pictures of the colon. A radiologist, a physician with advanced training in medical imaging, then uses special computer software to examine the images for polyps. Virtual colonoscopy eliminates the need to insert a long tube into the colon (as with Conventional Colonoscopy) or fill the colon with liquid barium (as with Barium Enema). Research performed at many centers across the country has provided substantial evidence that Virtual Colonoscopy is better able to detect polyps than Barium Enema and is nearly as accurate as Conventional Colonoscopy. In addition, most patients report that Virtual Colonoscopy is more comfortable than either Barium Enema or Conventional Colonoscopy.

In the 24-hour period prior to the exam, patients follow a special regimen to cleanse their bowel of stool and excess fluid. Typically, this regimen includes taking a laxative and abstaining from solid foods (certain specially formulated solid foods are available). The day of the test, they come to the hospital for a CAT scan. At the start of the procedure, a small rubber tube is inserted into the rectum so that the colon can be filled with air. A CAT scan is then performed while the patient lies comfortably. The total time required for the study is approximately 10-20 minutes. Because sedation is not required, patients are free to leave the CT suite immediately without the need for observation or recovery. Patients can resume normal activities immediately after the procedure and can eat, work or drive without a delay.

 

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