Future Technology: Colography and the Wireless Capsule

Abstract

This review of current available diagnostic modalities for evaluating neoplasms of the colon and rectum presents information on new techniques used in the examination of the colon and rectum, including colography and the wireless capsule. Colography may be performed using computed tomography or magnetic resonance. Both modalities look at two-dimensional and three-dimensional images of the colon and rectum. The ability of colography to detect neoplasms of the bowel is under investigation, and there are no conclusive data regarding the sensitivity or specificity of this technique. Advantages include patient compliance and minimal risk of complications. Disadvantages include the need for a full bowel preparation and inconclusive data regarding accuracy and cost. The wireless capsule is in its infancy. Very few data in human models exist. It is swallowed and painlessly propelled by peristalsis throughout the bowel. It has the ability to look at the small bowel as well as the colon and rectum. Both modalities hold promise, but they will need to be investigated further before any conclusions can be drawn about their diagnostic use.