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Before Scheduling Your Appointment

If you had chemotherapy or radiation treatment recently, let your doctor know the date of your last treatment. This will let them know the best time to schedule your PET scan.

The best time to have a PET scan is 3 weeks after your chemotherapy treatment or up to 6 weeks after your radiation treatment.

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What to Bring

Bring with you to your appointment your:

  • Your requisition (unless your doctor's office has already faxed us a copy or has entered an online request – possible for UHN physicians only)
  • Government-issued health card (OHIP card)
  • Latest CT imaging on a disk (if possible)
  • A list of current medications that you are taking

Please arrive 15 minutes before your appointment so that we can process your paperwork. If you are late, your appointment may be subject to re-scheduling.

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How to Prepare

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​During and After the Scan

  • When you arrive, the technologist will explain the test to you
  • The technologist will inject a radioactive sugar called FDG into your arm or hand with a small needle
  • You will wait in a special waiting area for 45 to 90 minutes. This gives the FDG time to get into the cells in your body.
  • You will then go into the scanning room and lie down on a special bed
  • The bed moves in and out of the scanner. You need to lie still and follow the instructions the technologist gives you. The scan can take about 30 to 45 minutes.
  • When the scan is happening, the technologist will leave the room. They can still see you through a window and hear you through an intercom. You may hear buzzing or clicking noises from the scanner. These sounds are normal.

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The Results of Your Scan

Once the imaging is complete, a Molecular Imaging Radiologist will review the images obtained and provide your doctor with a written report.

Please keep in mind the technologist cannot give you the results when your scan is finished.

If you need to cancel or reschedule your appointment, please call 416 946 4501 ext 3172 the day before your scan appointment.

If you have any questions or concerns about your scan, please call 416 946 4501 ext 3172.

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How Long Will Your Appointment Be?

You will be in the medical imaging department for 2 to 2½ hours. It takes some time to prepare for the scan.

The scan takes about 30 minutes. It may take another 15 minutes if the technologist needs to take extra pictures.

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Last reviewed: 7/11/2017
Last modified: 12/7/2017 6:38 AM