PET Scan
A PET scan uses a low dose of radiation to check the activity of cells in different parts of the body. You may have a PET scan and a CT scan together. This is called a PET-CT scan.
Before the PET scan
You'll need to remove any jewellery and other objects containing metal. You may also be asked to change into a hospital gown.
About an hour before the scan, you'll be given an injection of a small amount of a radioactive liquid (tracer) into a vein in your arm. This lets doctors spot any possible problems inside your body.
You'll need to lie down and rest so the tracer can work properly.
What happens during a PET scan
This video shows information on what to expect during a PET scan.
During the PET scan
- You'll be asked to lie on a flat bed, you may be asked to put your arms above your head or by your sides.
- The radiographer will control the scanner from another room. They'll be able to hear and speak to you during the scan.
- The bed moves backwards and forwards through the scanner. You'll need to lie still so it can take clear pictures.
After the PET scan
You'll usually be able to go home soon after the scan. You can eat and drink straight away.
The radiation from the tracer drops to a safe level quickly and will be gone from your body within a few hours. Drinking plenty of fluid will help flush it from your body.
