What is CT scan?
The computed tomography (CT) scan is a medical imaging procedure that uses x-rays and digital computer technology to create cross-section images of the body. It can make an image of every type of body structure at once, including bone, blood vessels and soft tissue.
What do we need to know at the time of booking and before the examination?
We will ask you to complete a questionnaire before the examination and sign a consent form to the contrast injection that you may need for your examination. If you have had an adverse reaction to a previous contrast injection or other drugs or if you have poor renal function, please let us know.
Please bring any previous films with you for comparison.
Spine, Bones and Joints:
No preparation required.
Head and Chest:
Fast 4 hours.
Abdomen and Pelvis:
Fast 4 hours. One hour before your examination time drink 1 litre of water/oral contrast over 30 minutes.
Fast 4 hours.
Fast 12 hours, but drink water as required for thirst. After you arrive you will be given a mannitol (sugar) drink which will fill your stomach and small bowel. The scan is done when this has reached the large bowel, usually 30-60 minutes after drinking.
After the preparation for your particular examination, and your consent if a contrast injection is to be given, you change into a gown (except for head scans), then lie on a bed which slides through the opening in the scanner. The bed will go through the scanner once for the planning scan, then once for each scan. Some scans such as liver CT may require scanning multiple-phases over a few minutes as the contrast flows through.
How long does a CT scan take?
After the preparation, the scan itself takes only a couple of seconds. However, including positioning, etc, it takes about 10-15 minutes.
You may not be able to have the contrast injection if you have had a reaction to a previous injection, or have poor renal function.
After Your Examination:
Drink plenty of water for 24 hours to flush out the contrast from the system.
What are the risks of CT scan?
Allergic reactions to contrast material can occur but significant reactions are rare, and generally respond to antihistamines. Our staff members are equipped and trained to treat contrast reactions.
Your images and report:
It is important that you make an appointment to return to your doctor after you have collected your examination result. Whether they are normal or abnormal, your doctor needs to correlate with other information for further management.
Your result will include a copy of the images from your study as well as a report from our radiologist.
Depending on your referrer’s preference(s), a copy of the report can also be sent to your referring doctor by fax or electronic download.
Digital copies of all studies are stored on our secured database for comparison with any future examinations.
Special instructions for diabetics:
If your examination requires fasting, then book an early morning appointment and have your breakfast and diabetic medication after the examination.
If your examination will require an intravenous injection of contrast medium, we need to know your renal function. Please bring along the results of your most recent blood test with creatinine and GFR level.