What is a a CT scan?
A CT scan (short for computed tomography) is a type of medical test that takes detailed pictures of the inside of your body. It uses X-rays and a computer to show your bones, organs, and tissues from different angles. CT scans help doctors find injuries, diseases or other health problems.
Who is a candidate for a CT scan?
A CT scan may be recommended if:
- You’ve had an injury, like a fall or car accident
- You have symptoms such as pain, swelling or trouble breathing
- Your doctor needs to check for problems in your brain, chest, belly or other areas
- You’re being monitored for a condition like cancer or infection
- You need help planning for surgery or other treatments
CT scans are used for both emergencies and routine checkups.
What to expect during a CT scan?
A CT scan is fast and painless. Here's what usually happens:
- You may be asked to change into a gown and remove jewelry or metal
- You’ll lie on a table that slides into a donut-shaped machine
- You’ll need to stay very still during the scan, which usually takes 10–30 minutes
- Sometimes you’ll get a contrast dye (by mouth or through an IV) to help show clearer images
The machine may make some whirring noises, but it won’t touch you.
What are the risks for a CT scan?
CT scans are generally safe, but there are some risks to know about:
- They use a small amount of radiation, which is usually safe but may not be recommended during pregnancy
- Some people may have a reaction to the contrast dye (such as feeling warm or getting a rash)
- People with kidney problems should tell their doctor before getting contrast dye
Your doctor will only order a CT scan when the benefits are greater than the risks.
What does recovery from a CT scan entail?
There’s usually no recovery time needed after a CT scan.
- You can go back to your normal activities right away
- If you had contrast dye, your doctor may suggest drinking extra fluids to help flush it out
- Most people feel completely fine afterward
Your doctor will contact you with the results and explain the next steps if needed.