• Skip to main content
Search
  • Home
  • Services
      • Behavioral Health
      • Bloodless Medicine
      • Brain & Spine
      • Cancer Care
      • Ear, Nose and Throat
      • Emergency Care
      • Senior Health
      • Heart & Vascular Care
      • Home Health Care
      • Immediate Care
      • Medical Imaging
      • Minimally Invasive Surgery
      • Orthopedics
      • Pregnancy & Childbirth
      • Primary Care
      • Rehabilitation Services
      • Weight Loss Surgery
      • Wound Healing & Care
      • Women's Health
  • Doctors
      • Find a Primary Care Doctor
      • Find a Doctor
      • Physician Referral
      • Practices:

        Baptist Primary Care
      • Baptist AgeWell
      • Baptist Behavioral Health
      • Baptist Endocrinology
      • Baptist ENT Specialists
      • Baptist Heart Specialists
      • Baptist Infectious Diseases
      • Baptist MD Anderson Cancer Physicians
      • Baptist Neurology
      • Baptist Pediatrics
      • Baptist Pulmonary Specialists (Nassau)
      • Baptist Rheumatology
      • Baptist Urology Group (Nassau)
      • Jacksonville Orthopaedic Institute
      • Lyerly Neurosurgery
  • Locations
    • Our Hospitals:

      • Baptist Medical Center Jacksonville
      • Baptist Medical Center South
      • Baptist Medical Center Beaches
      • Baptist Medical Center Nassau
      • Baptist Heart Hospital
      • Wolfson Children's Hospital

      Emergency Rooms (ER):

      • All ER Locations

      Imaging:

      • By Location

      • Imaging Center Locations
      • By Service

      • MRI
      • Bone Density
      • Screening Mammography
      • Diagnostic Mammography
      • Ultrasound
      • Vascular Ultrasound
      • CT Scan
      • PET Scan
      • Nuclear Medicine
      • X-Ray

      Urgent Care Locations:

      • Baptist Health Clinics at Walgreens
      • CareSpot Urgent Care

      Outpatient Locations:

      • AgeWell Center for Senior Health
      • Baptist Clay Medical Campus
      • Baptist MD Anderson Cancer Center
      • Baptist Neurodiagnostic Center
      • Baptist North Medical Campus
      • Heart and Vascular Testing Centers
      • Hill Breast Center
      • Infusion Center
      • Pharmacy
      • Rehabilitation Centers
      • Robotic Spine Surgery
      • Sleep Centers
      • Stroke and Cerebrovascular Center
      • Surgery Centers
      • Wound Care

      Health & Wellness:

      • 4her Wellness Resources for Women
      • JCA Wellness Connexion
      • Y Healthy Living Centers
  • Patient Info
      • Billing & Insurance Information
      • Insurance Plans Accepted
      • Cost Estimate Request
      • Financial Assistance Program
      • My Baptist Connect (Patient Portal)
      • Medical Records
      • Classes and Events
      • Clinical Trials
      • Tell Us What You Think
  • Health Library
      • Diseases and Conditions
      • Symptoms
      • Tests
      • Surgeries and Procedures
      • Injuries
      • Nutrition
      • Poison
      • Drug Information
      • Drug Images
      • Health News
      • Video Library
  • About Us
      • Administration
      • Awards & Honors
      • Careers
      • Provider Opportunities
      • Baptist MD Anderson Provider Opportunities
      • Spiritual Care
      • Social Responsibility
      • Community Health Needs Assessment (CHNA)
      • Corporate Wellness (PATH)
      • Volunteering
      • Newsroom
  • Juice
      • Health News Overview:

      • Aging Well
      • Brain, Spine & Nerve
      • Cancer
      • Child Health
      • Community Health
      • Diabetes
      • Ear, Nose & Throat
      • Heart & Vascular
      • Lungs, Breathing & Sleep
      • Mental Health
      • Orthopedics, Bones & Muscles
      • Pregnancy & Childbirth
      • Primary Care
      • Wellness
      • Women's Health
      • Men's Health
  1. Home
  2. Health Library
  3. Tests
  4. Brain PET scan

Brain PET scan

Tests
Brain positron emission tomography; PET scan - brain

A brain positron emission tomography (PET) scan is an imaging test of the brain. It uses a radioactive substance called a tracer to look for disease or injury in the brain.

A PET scan shows how the brain and its tissues are working. Other imaging tests, such as magnetic resonance imaging (MRI) and computed tomography (CT) scans only reveal the structure of the brain.

A PET scan requires a small amount of radioactive material (tracer). This tracer is given through a vein (IV), usually on the inside of your elbow. Or, you breathe in the radioactive material as a gas.

The tracer travels through your blood and collects in organs and tissues. The tracer helps your health care provider to see certain areas or diseases more clearly.

You wait nearby as the tracer is absorbed by your body. This usually takes about 1 hour.

Then, you lie on a narrow table, which slides into a large tunnel-shaped scanner. The PET scanner detects signals from the tracer. A computer changes the results into 3-D pictures. The images are displayed on a monitor for your provider to read.

You must lie still during test so that the machine can produce clear images of your brain. You may be asked to read or name letters if your memory is being tested.

The test takes between 30 minutes and 2 hours.

How to Prepare for the Test

You may be asked not to eat anything for 4 to 6 hours before the scan. You will be able to drink water.

Tell your provider if:

  • You are afraid of close spaces (have claustrophobia). You may be given a medicine to help you feel sleepy and less anxious.
  • You are pregnant or think you might be pregnant.
  • You have any allergies to injected dye (contrast).
  • You have taken insulin for diabetes. You will need special preparation.

Always tell your provider about the medicines you are taking, including those bought without a prescription. Sometimes, medicines interfere with the test results.

How the Test will Feel

You may feel a sharp sting when the needle containing the tracer is placed into your vein.

A PET scan causes no pain. The table may be hard or cold, but you can request a blanket or pillow.

An intercom in the room allows you to speak to someone at any time.

There is no recovery time, unless you were given a medicine to relax.

After the test, drink a lot of fluids to flush the tracer out of your body.

Why the Test is Performed

A PET scan can show the size, shape, and function of the brain, so your doctor can make sure it is working as well as it should. It is most often used when other tests, such as MRI scan or CT scan, do not provide enough information.

This test can be used to:

  • Diagnose cancer
  • Prepare for epilepsy surgery
  • Help diagnose dementia if other tests and exams do not provide enough information
  • Tell the difference between Parkinson disease and other movement disorders

Several PET scans may be taken to determine how well you are responding to treatment for cancer or another illness.

Normal Results

There are no problems detected in the size, shape, or function of the brain. There are no areas in which the tracer has abnormally collected.

What Abnormal Results Mean

Abnormal results may be due to:

  • Alzheimer disease or dementia
  • Brain tumor or spread of cancer from another body area to the brain
  • Epilepsy, and may identify where the seizures start in your brain
  • Movement disorders (such as Parkinson disease)

Risks

The amount of radiation used in a PET scan is low. It is about the same amount of radiation as in most CT scans. Also, the radiation does not last for long in your body.

Women who are pregnant or are breastfeeding should let their provider know before having this test. Infants and babies developing in the womb are more sensitive to the effects of radiation because their organs are still growing.

It is possible, though very unlikely, to have an allergic reaction to the radioactive substance. Some people have pain, redness, or swelling at the injection site.

Considerations

It is possible to have false results on a PET scan. Blood sugar or insulin levels may affect the test results in people with diabetes.

PET scans may be done along with a CT scan. This combination scan is called a PET/CT.

References

Chernecky CC, Berger BJ. Positron emission tomography (PET) - diagnostic. In: Chernecky CC, Berger BJ, eds. Laboratory Tests and Diagnostic Procedures. 6th ed. St Louis, MO: Elsevier Saunders; 2013:892-894.

Hutton BF, Segerman D, Miles KA. Radionuclide and hybrid imaging. In: Adam A, Dixon AK, Gillard JH, Schaefer-Prokop CM, eds. Grainger & Allison's Diagnostic Radiology: A Textbook of Medical Imaging. 6th ed. Philadelphia, PA: Elsevier Churchill Livingstone; 2015:chap 6.

Meyer PT, Rijntjes M, Hellwig S, Kloppel S, Weiller C. Functional neuroimaging: functional magnetic resonance imaging, positron emission tomography, and single-photon emission computed tomography. In: Daroff RB, Jankovic J, Mazziotta JC, Pomeroy SL, eds. Bradley's Neurology in Clinical Practice. 7th ed. Philadelphia, PA: Elsevier; 2016:chap 41.

BACK TO TOP

Review Date: 3/13/2019

Reviewed By: Alireza Minagar, MD, MBA, Professor, Department of Neurology, LSU Health Sciences Center, Shreveport, LA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.

 
 
 

 

 

A.D.A.M. content is best viewed in IE9 or above, Fire Fox and Google Chrome browser.
Content is best viewed in IE9 or above, Fire Fox and Google Chrome browser.

A Closer Look

  • Brain tumors - primary

  • Brain cancer

Tests for Brain PET scan

  • Brain PET scan

  • PET scan

  • Head CT scan

  • Head MRI

  • CT angiography - head and neck

  • Leg MRI scan

Daily Health and Medical News

Results for brain, brain pet scan , brain positron emission tomography, emission, imaging

  • AHA News: Obesity, Other Factors May Speed Up Brain Aging
    November 21, 2019

  • Animal Study Offers Hope for Treating Traumatic Brain Injuries
    November 19, 2019

  • Jimmy Carter Recovering After Brain Procedure
    November 12, 2019

  • AHA News: Omega-3 May Boost Brain Health in People With a Common Heart Disease
    November 12, 2019

  • Even a Little Exercise May Bring a Brain Boost
    November 06, 2019

© Copyright 2019 | All Rights Reserved

If you speak another language, assistance services
free of charge, are available to you.

Baptist Health Facebook Baptist Health Twitter Baptist Health on LinkedIn Baptist Health on Instagram Baptist Health on Youtube
Physician Login | Application Login | Employee Login
Quality Measures | Privacy | Non-Discrimination | Comments | Site Map