Margo,
If you suspect a false positive PET/CT scan results check if all precautions were taken at the time of the scan & the day before:
1. warm blanket : see
http://her2support.org/vbulletin/sho...ht=warm+coffee
2. Prior day: no sugar, artificial sweeteners,fruits, carbohydrates. No exercize etc... (Precautions normally recommanded by radiology department)