​A CT scan uses x-rays to make detailed pictures of the structures inside your body. During the test, you’ll li​e 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:

How to get ready for your CT scan

Instructions may vary depending on the type of CT scan you're 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.

Follow the instructions for your specific CT scan carefully. If you have questions about the information on how to get ready for your test, call the imaging department where you are having your test.