Preparation for PET/CT Exam15

Before you have a PET/CT scan it is important to make sure you follow the following points:

  • Avoid strenuous activities on the day before and the day of your PET/CT scan as excessive muscular activity may interfere with the interpretation of the results of the scan.
  • Do not eat for six hours prior to their PET/CT scan examination. You can drink water, but not anything else
  • If you are a diabetic and take insulin to control your diabetes mention this before the PET/CT scan, as you will probably be scheduled for an early afternoon appointment
  • You must remove all jewelry, hair pins, and clips prior to your exam
  • Clothes must be free of metal zippers, snaps, etc
  • Please be prepared to stay for approximately 3 hours
  • Your blood sugar level will be tested prior to the injection of the radiopharmaceutical. If your blood sugar level is elevated, your scan will be rescheduled.
  • Before the injection of the tracer drug you will have an angiocath placed into a vein in your arm for ease of injection
  • A small volume (normally 370MBq) of a radio pharmaceutical (normally FDG) is injected through the IV line in your vein
  • After the injection, you must wait for approximately 45 minutes before the scanning can begin.
  • Before the PET/CT scan you will allowed to relax in one a quiet room. It is important that you relax and rest during this time to allow the radio pharmaceutical to properly distribute throughout your body.


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