Does the Test Require Bowel Cleansing (Laxatives)?
Yes. The bowel-cleansing regimen is the same for both a regular colonoscopy and CT colonography. On the day before the procedure, you stay on clear liquids all day and on the evening before and the morning of the procedure, laxatives are taken to flush waste from the colon. In addition, contrast imaging tablets need to be taken three times a day for one to two days prior to the test.