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Diagnostic CT
TECHNOLOGY
Computed Tomography (CT) is a technology that can image structures of the body, including bone, soft tissue and blood vessels. A CT (or CAT) scanner combines a rotating x-ray tube and a computer to produce high-resolution, cross-sectional images.
APPLICATIONS
SCREENING
CT technology is used to screen for coronary artery disease, lung cancer and colon cancer. It can also identify aortic aneurysms, gall- and kidney stones and osteoporosis in the asymptomatic stage.
Please see our Screening Exams section for more information.
DIAGNOSTIC
CT is particularly suited to evaluate bony anatomy, including fractures, loose bodies in joints, and osteoarthritis.
It can be used to obtain information on body organs such as the liver, kidney, pancreas, liver and adrenal glands. A contrast medium with the CT scan highlights blood flow and identifies tumours and abnormalities. CT surpasses MR for the evaluation of lung disease and is a stunning new tool in coronary angiography.
CT can be used to evaluate problems in the spine such as tumours, fractures and spinal stenosis. Herniated discs in the lumbar region can also be identified.
A CT scan can also be used for sinuses and the mandible/maxilla prior to dental implants.
SAFETY
A CT scan does involve low dose radiation. In addition, if a contrast medium is used (as required for certain types of exams) there is a very small risk of allergic reaction.
To view a comparison of radiation exposure for x-rays and CT, click here.
PRE-SCREENING CONSIDERATIONS
Pregnancy - Women who are pregnant or women who might be pregnant should not have a CT scan.
Heart Surgery - Patients who have had heart surgery (in particular heart catheterization and stent insertions) will not be able to have a screening CT scan of the heart, but may be eligible for a Coronary CT Angiography (CCTA).
CLAUSTROPHOBIA
A CT scanner is an open machine and non-claustrophobic by design. Most CT scans take only a few minutes to perform.
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