Does anyone out there have new info on timeframe when the first post-treatment-(chemo) PET scan should be done. My husband just finished a clinical trial of gemcitabine and paclitaxol the end of February. He had a PET exactly one month later Mar 27 which shows cancer still lights up in same areas. Is it possible the chemo is still working and hasn't had time to kill the cancer. I know this is probably a stretch.