"Normal" results for this blood test should be about 35 or lower. I had a petscan years ago, can't really remember, I believe I was injected withsome kind of dye and had to sit very still and quietly for a while before the scan, it shows 'hot spots' and any kind of activity beforehand may result in false readings. I think it was a regular kind of scan thing like a ctscan or bone scan, no biggie. her2neu- is a good thing, congrats and good luck!