Measuring the SUV (Standardized Uptake Value) for PET scans
Dear OncoLink "Ask The Experts,"
I have had three PET scans for my malignant melanoma. My first one was April 2000 to evaluate me for Interferon; it was negative. The second was October 2001 because I had another lymph node swollen. That PET was negative except for that node. My last one June 2002 showed low activity in legs and neck. What is the activity Measuring the SUV (Standardized Uptake Value) level of concern? I heard that the activity is graded 0-20.
Peeyush Bhargava, MD, Chief Fellow in the Department of Nuclear Medicine at the University of Pennsylvania, responds:PET scans are complex studies involving a lot of variables related to the patient and to the technique. The images show the distribution and metabolism of FDG (fluoro-deoxy glucose) throughout the body. Cancers show up as foci/areas of intense activity since cancer cells are more active and take up a lot of FDG.
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