Head pancreatic cancer patient treated with fixed geometry. Before treatment, the arrow identifies the lesion on the HASTE T2-W sequence (A); after treatment the lesion (arrow) shows non-significant differences in signal intensity and size in (B) (one month after treatment) and in (C) (six months after treatment). In addition, non-significant difference on the CT study between pre- (D) and post-treatment was observed both after one month (E) and after six months by ECT (F). Instead, PET evaluation between pre- (G) and post-treatment detected a reduction of glucose uptake both after 1 month (H) and after 6 months (I) by ECT. According to data, the patient, after one month and after six months, was classified to be in stable disease by ECT.