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Overview of Imaging Tests

By

Mehmet Kocak

, MD, Rush University Medical Center

Last full review/revision Apr 2021| Content last modified Apr 2021
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Imaging tests provide a picture of the body’s interior—of the whole body or part of it. Imaging helps doctors diagnose a disorder, determine how severe the disorder is, and monitor people after the disorder is diagnosed. Most imaging tests are painless, relatively safe, and noninvasive (that is, they do not require an incision in the skin or the insertion of an instrument into the body).

Imaging tests may use the following:

For information regarding imaging tests common for specific diagnoses and screenings, see the following:

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Computerized Tomography (CT)
In computerized tomography (CT), x-ray images of the body are taken from multiple angles and converted by a computer into images resembling 2- and 3-dimensional slices (cross-sections). People having a CT scan are asked to remove all jewelry and metal items such as zippers and belt buckles located near the body part being scanned. Why are patients asked to remove metal before having a CT scan?
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