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Computed Tomography Scan


A computed tomography (CT) scan uses x-rays to take pictures of your blood vessels, tissues, bones, or organs. It is also called a computerized axial tomography (CAT) scan.


Call your local emergency number (911 in the US) if:

  • You have signs of an allergic reaction to the contrast liquid, such as trouble breathing, swelling of your mouth or face, or fainting.

Seek care immediately if:

  • You are dizzy or feel faint.
  • You have a rash, itching, or swollen skin.
  • You have nausea or are vomiting.
  • You are suddenly urinating less than usual.

Call your doctor if:

  • You have questions or concerns about your condition or care.

Drink liquids as directed:

Liquids will help flush the contrast liquid out of your body. Ask how much liquid to drink after your CT scan, and which liquids to drink.

Follow up with your doctor as directed:

Write down your questions so you remember to ask them during your visits.

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The above information is an educational aid only. It is not intended as medical advice for individual conditions or treatments. Talk to your doctor, nurse or pharmacist before following any medical regimen to see if it is safe and effective for you.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.