Orbit CT scan

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CT scan

Overview

Risks

Results

Orbit CT scan

Definition:

An orbital CT scan is a procedure that uses computed tomography to examine the orbits (the eye sockets) and the globes (the eyes).

Alternative Names:

CT scan - orbital

How the test is performed:

A contrast dye may be injected into a vein before the test.

You lie on a table that can be moved by the technician operating the scanner. Only your head is positioned inside the CT scanner. The exam usually lasts no more than a few minutes.

You may be allowed to rest your head on a pillow, but this must be done before the scan begins.

How to prepare for the test:

You must sign an informed consent form. Remove dentures, any jewelry, and anything metal.

How the test will feel:

The most discomfort arises from the need to lie still on the table during the scan. The scan itself is painless.

Why the test is performed:

This test is helpful in diagnosing a lesion or other disease which affects the tissues around the eyes, sinuses, optic nerves (nerves supplying the eyes), or eye muscles and vessels. Subtle fractures of the orbits may also be detected.

Review Date: 11/3/2004
Reviewed By: Jeffrey J. Brown, MD FACR, Mallinckrodt Institute of Radiology, Washington University School of Medicine, St. Louis, MO. Review provided by VeriMed Healthcare Network.

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