INDICATIONS: Failed colonoscopy in the last three months

Unsuitable for colonoscopy


LIMITATIONS: This test is performed for the detection of colonic polyps. It has lower sensitivity than conventional colonography, and thus it is performed in patients who are unable to undergo colonoscopy or for whom colonoscopy has failed due to inability to pass the colonoscope.


PREPARATION: The preparation is similar to a conventional colonoscopy. There is a two day preparation for this scan which you can pick up from reception at the time of booking. The preparation allows us to obtain the most accurate scan result.



CT colonography takes only 20 minutes and involves a small injection of buscopan to relax the bowel.

A tube is inserted into your back passage and your bowel is expanded with air. It is normal to feel some discomfort, similar to "wind pains". 

Two sets of images are obtained, one with you laying on your back and another on your stomach.

Once the pictures are taken the technician will let some air out and remove the tube. Most of the discomfort normally eases off at this stage but may take a few minutes to resolve.


POST PROCEDURE: Abdominal discomfort which will ease off after a few hours.


RESULTS: The images obtained by the technician will be analysed and interpreted by the Radiologist.

 It may take several days for these results to be analysed so you will need to book your follow up appointment with your doctor accordingly.

A hyperlink will be added to the report that will allow your doctor to access your images.

We provide long term electronic storage of your report and images, so you may obtain a copy either on the day of the scan or in the future.