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PET/CT scan is a type of imaging test that combines positron emission tomography (PET) and computed tomography (CT) techniques. Combined PET/CT scans can be performed on any part of the body.

PET/CT may be used for:

  • Early diagnosis of cancer, heart disease, epilepsy, Parkinson's disease, Alzheimer's disease, and other dementias
  • Accurate assessment of the location and stage of malignant disease
  • Non-invasive monitoring of the effects of treatment
  • A single-exam alternative for multiple medical testing procedures

How to Prepare

  • Nothing to eat or drink at least 8 hours prior to exam time. If you are diabetic, do not eat or drink 4-6 hours.
  • You may drink as much water as you would like
  • Do not take diabetes medication on the day of your exam.
  • You may take any other medications, as needed.
  • Wear loose comfortable clothing, with no metal zippers or buttons.
  • No extreme/strenuous exercise, 2 days prior to your appointment.
  • No Coffee/ caffeinated products, 2 days prior to your appointment.
  • Arrive 30 minutes prior to appointment time to register and complete necessary paperwork.

What to Expect

  • The technologist will check your blood sugar level
  • If your blood sugar is within range, the technologist will inject a radioactive isotope.
  • There is a 1 hour rest period, in order to allow your body to absorb the isotope.
  • The PET/CT scan will take approximately 30 minutes to complete.
  • If you plan to travel into Mexico within 24 hours after the exam, notify the technologist for special instructions.
  • Results will be sent to the referring physician within 24-48 hours.