PET is an acronym for Positron Emission Tomography. PET is a test that uses special imaging cameras and a radioactive type of sugar to produce pictures of the function and metabolism of the cells in the body.

CT stands for Computerized Tomography. CT is an x-ray test that generates a detailed view of the anatomy or structure of organs and tissues in the body. The CT scan can show the dimension of vessels, lymph nodes and organ systems.

A PET/CT scan merges both technologies into a single machine. It provides a picture of function (PET), a picture of anatomy (CT) and a merged picture of both the body’s metabolism and structure.

Little preparation is needed for a PET/CT exam. Typically you will be asked not to eat 6 to 8 hours prior to the exam, however, you can drink water. If you’re taking medication, please consult with your physician before the exam.

Please avoid strenuous exercise 24 hours before your appointment. You will be asked to put on a gown for the exam. Please do not wear any jewelry.

Contact your doctor prior to your PET/CT scan if:

• You are or may be pregnant
• You are diabetic
• You are unsure if you should take your medication
• You have had recent radiation therapy  

Prior to the exam you will receive a small injection of radioactive sugar (FDG). You will be asked to sit down on a comfortable reclining chair for 30 to 60 minutes while the FDG travels through your body.

Next, the technologist will assist you to the scanner. The CT portion of the exam is completed first, followed by the PET portion. You may be asked to hold your breath for several seconds while the CT scan is performed.

It is important that you don’t move during the scan. The length of the exam is determined by your height and the area being scanned. Most PET/CT scans are completed within 20 to 40 minutes.

Upon completion of the scan, the computers will produce images for your doctor to review.  

For more information or to pre-register, please call 503-561-3499.

Once the total scan has been performed, you may resume normal activity. Even though the FDG will quickly leave your body, you can expedite the process by drinking plenty of water after your scan is complete.

Your PET/CT results will be processed immediately. The radiologist will contact your referring physician to convey all pertinent information gathered from the scan.