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Computed Tomography (CT)

How it Works

During a CT scan, a thin beam of radiation is focused on the specific body part to be studied. The X-ray tube moves completely around this body part as the table moves the patient through the scanner. This creates multiple cross sectional images, which are sometimes compiled into 3-D images when necessary. Due to the precision of these exams, the patient must lie completely still.

The cross-sectional images are produced and manipulated with the aid of advanced computers to allow a thorough picture of the patient's anatomy.

How to Prepare
  • Arrive 15 minutes before your appointment
  • Bring your Yukon health care card
  • Go directly to the marked CT department at the far end of the main atrium as you head towards the WGH Emergency Department.
  • Notify your technologist before your exam if you are breastfeeding, pregnant or think you may be pregnant


Preparing for a CT Colonography?
  • Learn more about the benefits, risks, what to expect, how to prepare and more with this helpful guide (PDF).
What to Expect
Information about Contrast Media

Some X-ray examinations require the use of contrast media, which is an iodine containing liquid injected into the body to enhance X-ray procedures. When contrast media is used, a consent form must be signed. If you are unable to clearly understand English, please ask about what interpretor services are available at the hospital.

Mild reactions to contrast media may include nausea and hives.

More severe reactions may occur. If you are asthmatic or have had an allergic reaction to contrast media in the past, please notify your physician and our staff. Failure to do so may result in the cancellation or postponement of your exam. Your health is our priority, and it is necessary that we are aware of any possible risks or complications.


Learn More about CT

CT can often be confused with MRI, in part, because both machines look quite similiar. In fact, while both exams are complimentary, each are considered different tests in several ways. Their use depends on what your doctor needs to know. Dr. Philip Pattison, radiologist for Whitehorse General Hospital, explains the similarities and differences between MRI and CT as well as why each are used and what you can expect if you come to hospital for an exam.