Colonography CT image of internal organs

CT Colonography

CT colonography (also known as CT colonoscopy, virtual colonography or virtual colonoscopy), is a CT scan to look at the colon, or large bowel.

CT Colonography

CT colonography (also known as CT colonoscopy, virtual colonography or virtual colonoscopy), is a CT scan to look at the colon, or large bowel.

What is CT colonography?

(Also known as CT colonoscopy, virtual colonography or virtual colonoscopy).

A computed tomography colonography (CTC), is a CT scan to look at the colon, or large bowel. A CT scan is a specialised x-ray test during which the patient lies on a moving table/bed as it passes through a circular x-ray machine.

The advantage of CT Colonography is that it is very safe and can be used as an alternative examination if you are not able to undergo traditional colonoscopies or barium enemas.

How much will my examination cost?

Fees for radiology tests can vary and depend on a number of factors. Please make an enquiry with us by phone or email to get a quote for the service you require. ACC co-payments may apply.

We accept all radiology referral forms.

Waikato
Phone: 0800 426 723
Email: Booking.Waikato@i-med.co.nz

Rotorua
Phone: 0800 466 564
Email: Booking.Rotorua@i-med.co.nz

Bay of Plenty
Phone: 07 544 5993
Email: Bookings.bop@i-med.co.nz

Taranaki
Phone: 06 759 4317
Email: bookings@taranakiradiology.co.nz

What should I expect prior to the procedure?

Upon booking your appointment you will be given a preparation pack containing the following:

Detailed information about the bowel cleansing process
A packet of laxatives - used to cleanse the bowel and rid the colon of any stools. You may experience many bowel movements over several hours.

It is necessary for the colon to be completely empty of food residue. This will be achieved by a restricted diet and laxatives.

What happens during a CT Colonography?

The radiographer will get you to lie on the CT table.

A small tube will be inserted into your rectum and carbon dioxide (CO 2) is introduced into the bowel until it is fully distended. While you are lying on your back you will be asked to hold your breath and the CT scan will be performed. You then turn over onto your stomach and again holding your breath the second CT scan is performed.

The Radiologist will check the scan and once the images are completed the tube will be removed.

Is CT Colonography painful?

Prior to the procedure a small bowel relaxant will be administered as the distention of the colon with CO 2 may be uncomfortable. You may get the feeling of fullness, as though you need to pass wind. It should not be painful. This discomfort will last for just a few minutes.

How long does it take?

The actual scan is about 10-15 minutes but you will be in the department for approximately 30 minutes.

What happens after the test?

You will be allowed to leave straight after the procedure and resume your normal diet!

The Radiologist, who is trained in interpreting radiology examinations will analyse all the images and send a written report to your Specialist or GP who will then share the results with you.