About the Scan – CT Colonography

CT colonography, also known as virtual colonoscopy is performed by SMIL to obtain an interior view of the colon (the large intestine) that is otherwise only seen with a more invasive procedure where an endoscope is inserted into the rectum and passed through the entire colon.

During the CT colonography the technologist will begin by positioning you on the CT examination table, usually lying flat on your back or less commonly, on your side or on your stomach.

A very small, flexible tube will be passed two inches into your rectum to allow air to be gently pumped into the colon using a hand-held squeeze bulb. Sometimes an electronic pump is used to deliver carbon dioxide gas into the colon. Sometimes a retention balloon is inflated on the rectal tube to help keep the tube positioned correctly. The purpose of the gas is to distend the colon as much as possible to eliminate any folds or wrinkles that might obscure polyps from the physician's view.

Next, the table will move through the scanner. You will be asked to hold your breath for about 15 seconds before turning over and lying on their back or side for a second pass that is made through the scanner. In some centers the sequence of positions may be the opposite: facing upward first and then facing down. Once the scan is done, the tube is removed.

The entire examination is usually completed within 15 minutes.

Learn how to prepare for the scan in the CT colonography preparations section.

Find out if this procedure is right for you in the benefits and risks of CT colonography section.

For a downloadable/printable PDF about this exam with preparation instructions click here.

Where
We Are

Who
We Are

What
We Do

What Patients
Are Saying

Schedule Online

Provider Services

Facebook logo
youtube logo
© 2018 Scottsdale Medical Imaging
SMIL is a proud affiliate of SDI
Notice of Privacy Practices English / Spanish
Notice of Nondiscrimination
Patient Bill of Rights
Careers

Website by Idyllwild Advertising

SMIL – Proud to Provide Medical Imaging for ASU's Student Athletes ©

Most of the time everything is done on time, everyone is very nice and I have no complaints!
, Apr 16, 2018
Check-in was easy, appointment time was honored. In and out in about 30 minutes!
, Jan 3, 2018
Each employee took into consideration that the reason I was there was stressful, and treated me as such
, Jan 19, 2018
Very nice staff. I felt very comfortable.
, May 10, 2018
All the staff were polite and kind all through the procedure. They kept me informed of what was going on, which made me comfortable as a patient.
, Mar 22, 2018