It takes about 30 minutes to complete a PET-CT scan and 45 minutes for a PET-MRI scan. During the scan you must be very still so that the images aren't blurred. When you are ready, you lie on a narrow, padded table that slides into the part of the scanner that looks like a doughnut hole. You rest and remain silent in a reclining chair for 30 to 60 minutes while the tracer is absorbed by your body. You may briefly feel a cold sensation moving up your arm. When you arrive for your scan, you may be asked to:Ī member of your health care team injects the tracer into a vein in your arm or hand. The PET-CT or PET-MRI scanner is a large machine that looks a little like a giant doughnut standing upright, similar to CT or MRI scanners.įrom start to finish, the procedure takes about two hours to complete and typically does not require an overnight hospital stay. A general rule is to avoid strenuous exercise for a couple of days before the study and to stop eating four hours before the scan. Your provider will give you detailed instructions on how to prepare for your scan.
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