If your doctor has recommended a PET scan, Banner Health offers advanced imaging services to help diagnose and monitor many health conditions. Our imaging specialists use positron emission tomography (PET) scans to give doctors detailed information about how your body’s tissues and organs are functioning.
A positron emission tomography (PET) scan is a type of nuclear medicine imaging test that helps doctors see how tissues and organs are working inside the body.
During a PET scan, a small amount of radioactive tracer is injected, swallowed or inhaled. The tracer travels through the body and collects in certain tissues. A special PET scanner detects the tracer and creates images that show areas of healthy and unhealthy activity.
Unlike some imaging tests that only show structure, a PET scan shows how tissues and organs function, which can help detect disease earlier.
PET scans are often combined with other imaging tests to provide more complete information.
A CT scan uses X-rays to produce cross-sectional images of the body. An MRI scan uses magnetic fields and radio waves to create detailed images of organs and tissues. When combined with PET imaging, doctors can see both how organs look and how they function.
Your doctor may recommend a PET scan to evaluate how your body is functioning at the cellular level. PET scans are commonly used to:
Because PET scans measure metabolic activity, they can help doctors determine whether a disease is progressing or whether treatment is effective.
Proper preparation helps ensure accurate PET scan results. Your doctor will provide specific instructions, but general guidelines include the following.
Do not eat for at least six hours before your PET scan. You may drink water during this time. Avoid foods or drinks with caffeine or sugar, since they can affect blood sugar levels and interfere with results.
Continue taking prescribed medications unless your doctor advises otherwise. Tell your care team about all medications and supplements you take.
Wear comfortable, loose-fitting clothing. Avoid jewelry or accessories that contain metal.
Tell your doctor if you:
Drink water before your scan. Staying hydrated helps your body eliminate the tracer more quickly afterward.
Bring records of previous imaging tests such as CT scans, MRI scans or earlier PET scans if they were performed elsewhere. Comparing images can help improve diagnostic accuracy.
If you feel anxious in enclosed spaces, tell your doctor ahead of time. A mild sedative may help you stay comfortable during the scan.
PET scans may be performed at a Banner Health hospital, clinic or Banner Imaging location.
First, the radioactive tracer will be injected, swallowed or inhaled depending on the type of scan. You may wait for a short period while the tracer travels through your body so it can be detected by the scanner.
During the scan:
The test itself is painless. The PET scanner detects radiation from the tracer, meaning the scanner does not produce radiation on its own.
After the test, the tracer gradually leaves your body, usually within about 60 hours.
The entire PET scan process typically takes 30 minutes to two hours, depending on the type of imaging test and how long it takes for the tracer to circulate through your body.
PET scans use a small amount of radioactive tracer and are generally considered safe. For most people, there are no known significant risks.
Tell your doctor if you:
Your care team will determine whether a PET scan is the safest option for you.
PET scans are available at many convenient Banner Imaging locations. Our imaging specialists use advanced technology to provide accurate results and help guide your care.
If your doctor has recommended a PET scan, the team at Banner Health can help coordinate your imaging and next steps.
Whatever your need, your doctor can refer you to one of our conveniently located free-standing imaging centers or one of our hospitals.
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