Electronic colon cleansing uses contrast solutions which are mixed
with food to enhance the colonic materials in the abdominal images.
Then it removes the enhanced materials by image segmentation. On the
left shows the enhanced materials inside the colon (indicated by the
arraws) of a volunteer CT (computed tomography) image. The segmented
results are shown on the right. This technique will simplify the bowel
preparation and reduce false diagnosis in virtual colonoscopy.