2016-06-16 17:48:03 UTC

CT Colonography 104: During

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Before Your CT Colonography

Your doctor will tell you more specifically what you can expect during the test. Some things may include:

  • A nurse will review your medical history, medications and allergies. 
  • You will change into a hospital gown. 
  • Your doctor will review the consent form for the test, answer any of your questions and ask you to sign the form, which says you understand the test being done.


During Your CT Colonography


  • During the test, everything will be done to make sure that you are at ease, safe and comfortable. 
  • You will not be put to sleep for this test. This means that after the test, you will be able to go on about your regular activities.
  • To start, you will lay on your back while inside a computerized tomography (CT) machine.
  • A small, rubber tube will be gently and carefully placed into your rectum, passing through the anus. This may feel uncomfortable, but will not last long. 
  • Air will be passed through the small, rubber tube to expand the bowels. You may feel the need to move your bowels or some cramping or fullness.
  • Next, you will lay on your stomach for the CT scanner to take more pictures.
  • You must stay as still as you can while the pictures are being taken so they come out clear. 
  • A radiologist will look at the images to detect any signs of polyps, cancer or other health issues. 
  • If a polyp or other abnormality is found, you will likely need a colonoscopy to remove it. 
CT Colonography – What to Know:
  • CT colonography is a test to look at your colon and rectum. It can be used to check for colon cancer.
  • You are not put to sleep for CT colonography.
  • Like a colonoscopy, you will need to clean out your colon before the test.
  • If a polyp or abnormality is found in your CT colonography, you will likely need a colonoscopy to remove it.


© AGA, September 2017

©AGA, July 2016

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