Computerized tomography (CT) scans use x-ray technology to capture multiple cross-sectional images of organs, bones, and tissues inside your body. CT scans are a painless, noninvasive way to identify abnormalities, diagnose a variety of medical conditions, assess the extent of disease spread, and monitor treatment progress.
UPMC imaging experts use leading-edge CT imaging technology to accurately diagnose many types of disorders, ensuring that you receive the most advanced care.
Computerized tomography (CT) scans use X-ray technology to take multiple cross-sectional views of organs, bones, and tissues inside your body. CT scans provide a painless, noninvasive method of identifying abnormalities, diagnosing a variety of medical conditions, assessing the extent of disease spread, and monitoring treatment progress.
UPMC experts perform CT scans on many areas of the body, including:
There are two types of CT scans, including:
Our team uses CT scans to diagnose conditions including:
You may need a CT scan to:
You may be a candidate for a CT scan if your doctor suspects you have a condition that can be diagnosed or monitored with a CT imaging test. CT scans are safe for most people.
CT scans are safe for most people.
However, complications and risks include:
Your preparation instructions will depend on the type of CT scan you're having.
You don't need to do anything special to prepare for a CT scan without contrast. Unless your doctor tells you otherwise, you can take medication and eat normally.
You may need to follow special instructions if you have an oral contrast CT scan. Tell your doctor if you've ever had a reaction to an x-ray dye or topical antiseptic iodine, such as betadine. If you have, you'll have to take medicine 13 hours before your test.
Arrival times for your CT scan will vary depending on the location of your appointment.
Other instructions to prepare for your CT scan with contrast include:
You can expect to resume your normal activities on the same day as your test.
CT scanning takes less than 30 minutes in most cases. However, some tests may be shorter or longer depending on how many areas we need to scan and the CT scanner we use. CT scans using contrast dye may take longer, but not all do.
When you arrive at the imaging center, your technologist will ask you questions about your health and any past surgeries. You may be asked to change into a hospital gown or take off any jewelry or metal. You will also have a chance to ask questions about the test.
If you're pregnant or think you might be, it's vital that you tell your imaging technologist before your CT scan starts. Radiation exposure can be harmful to an unborn baby.
If you're having a CT with contrast, we'll give it to you either by:
The CT scanner is shaped like a large ring, similar to a donut standing upright. A narrow table moves through the center hole.
When it is time for your test, your imaging technologist will:
You should be able to resume your normal activities, diet, and medication schedule immediately after your CT scan. However, if you had sedation to help you relax during your test, you will need to arrange for someone to drive you home.
After your CT scan, a radiologist will review and interpret your CT images and provide the results to your doctor. Your doctor will discuss your CT scan results with you and, if needed, develop a personalized treatment plan for you.
You should contact your doctor if you have any signs of infection or other complications, including:
When you choose UPMC for a CT scan, you will receive:
By UPMC Editorial Staff. Last reviewed on 2025-08-28.
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