FDG Metabolic Brain study

What: A PET brain scan is used to either diagnose, stage, restage, or monitor therapy response to primary brain cancers or metastatic brain tumors. FDG PET/CT brain studies can also differentiate different types of dementia.

Images are acquired of just the brain after the same uptake period used in all other PET exams.

What to expect: Plan to be at the testing center for 1 ½ to 2 hours. It is important to arrive on time. If you cannot arrive on time, please call 24 hours in advance to reschedule your test.

A PET-CT brain study is not painful but it requires patience. You will receive an injection in advance of the scan. It takes 60 minutes for the material to be distributed throughout your body. During this time you will be asked to relax comfortably in a recliner in a quiet dark room. You will also need to be still for the entire scan, which takes 15-25 minutes depending on what your doctor has ordered.

Prep: You will receive very detailed instructions to prepare for your study. The quality of your scan depends on your adherence to these directions, so it is very important to follow them closely. If you have any questions about this procedure, please call our office to speak to a specialist. Prep may vary based on your study. Please be sure to review the instructions specific to your study.

  • Do not eat or drink for at least 6 hours before your exam, with the exception of water.
  • Drink 3-4 8-oz glasses of water within 4 hours prior to your test; empty your bladder as often as needed.
  • If your doctor has told you to take your regular medicine, you may take it with water.
  • Do not consume nicotine or caffeine 4 hours prior to your exam.

Safety notes: Follow the same safety guidelines as the general PET/CT.