Imaging Tests

Computed tomography (CT)

A CT scan uses x-rays to make detailed pictures of the structures inside your body. During the test, you’ll lie on a table that’s attached to a donut-shaped machine, called CT scanner. You may get contrast dye injected into a vein or in a drink that you swallow. This helps to show parts of your body more clearly.

Learn more about general CT scans or choose a specific test from the list below:

Abdomen & pelvis

Head & face

Heart & chest

Neck

Spine

How to prepare for a CT scan

Instructions may vary depending on the type of CT scan you are having. The instructions below explain how to get ready for your CT scan so it can be done safely and correctly.

Biopsy patient instructions explain what to do if a small piece of tissue will be taken for testing. Enhanced patient instructions tell you how to prepare for a CT scan that uses a special dye called contrast to make the pictures clearer. Non-enhanced patient instructions tell you how to get ready for a CT scan done without this dye.

Please read the instructions for your specific CT scan and follow them before your appointment.

Abdomen

Bladder

Blood Vessels & circulation

Heart

Lung

Current as of: January 26, 2026

Author: Diagnostic Imaging, Alberta Health Services

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This material is not a substitute for the advice of a qualified health professional. This material is intended for general information only and is provided on an "as is", "where is" basis. Although reasonable efforts were made to confirm the accuracy of the information, Alberta Health Services does not make any representation or warranty, express, implied or statutory, as to the accuracy, reliability, completeness, applicability or fitness for a particular purpose of such information. Alberta Health Services expressly disclaims all liability for the use of these materials, and for any claims, actions, demands or suits arising from such use.

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