An SUV score is the amount of fluorescence the contrast medium gives off in a PET scan. The dye is basically sugar laced with a radioactive agent. Since cancer cells, and unfortunately inflamed cells, require more glucose ("avid"), it's an indirect measure of cancer cells. As I said, in my case, I still have considerable inflammation, which blurs the picture. Normal is 0-2.5. I should explain I'm going to MD Anderson, although I earlier went through Mayo for lymphedema following problematic PAD surgery...