The DRD Visualization Laboratory
This video shows a virtual colonoscopy 
of the rectosigmoid colon performed in a retrograde fashion. There is a 10-mm colonoscopically-proven polyp in the sigmoid colon seen at the top of the frame at the midpoint of the movie. The movie concludes at the tip of the rectal tube which was used to insufflate the colon. CT dataset courtesy of C. Daniel Johnson, MD, Department of Radiology, Mayo Clinic, Rochester, MN.
Email comments or request more information: rms@nih.gov
NOTE: Video requires Windows Media Player software and high-speed internet connection.
If you experience any problems viewing this video or require an accessible alternative, please contact rms@nih.gov.