It uses CT scanning much like an X-ray to study the colon rather than inserting scopes through the rectum. A computer software program takes those CT images and turns them into a 3D view of the colon. This will detect more polyps and cancers and refer patients to conventional colonscopy at earlier stages of disease. A standard colonoscopy can take about a half-hour. The virtual colonoscopy will take five minutes.
Doctors quickly insert a small tube into the rectum to inflate the colon.
The patient is asked to hold his breath. The CT scan is then taken. It' s not as precise just yet, but it's hoped as a screening tool, more people will get this important test. For Lois Homer, a paitent, the virtual colonoscopy revealed no problems. Both the virtual colonoscopy and the camera in a pill are not FDA-approved just yet.