CPT® Code 74261

Computed tomographic (CT) colonography, commonly known as virtual colonoscopy, is a non-invasive diagnostic imaging procedure used to visualize the colon and rectum. This procedure is particularly indicated for patients who exhibit signs or symptoms suggestive of bowel disease, such as abdominal pain, changes in bowel habits, or unexplained weight loss. Prior to the CT colonography, patients undergo a bowel preparation process the night before to ensure that the bowel is clear of stool, which is crucial for obtaining high-quality images. During the procedure, a small flexible tube is inserted into the rectum to introduce air or carbon dioxide gas into the colon, allowing for adequate distension of the bowel. This distension is essential for capturing clear images of the colon walls. The patient is positioned on the CT table, first in a supine position for the initial imaging pass, followed by a prone position for a second pass. The resulting non-contrast CT images of the abdomen and pelvis are then analyzed, and 3D reconstructions of the colon are created to enhance visualization. The physician interprets these images and generates a comprehensive written report detailing the findings, which may be compared to any prior radiological studies for a thorough assessment.