Dr. Geetanjali Akerkar, a gastroenterologist, right, and Alex Rasiavicus, a radiologist, pose at this computer terminal at Exeter Hospital in Exeter, N.H. They are looking at images of the inside of a patient's colon which were taken by a computer tomography or CT scanner. A new software program is being tested by Akerkar which would enable health professionals to screen for cancerous growths by using images taken by a CT scanner. The images would be woven together and the colon examined on the computer screen. Traditionally, a patient would have to be sedated and a flexible scope would be used to view the inside of the colon. This photo was taken for an Associated Press health story.