Fig. 2

An 85-year-old man affected by Gleason 4+3 PCa treated with EBRT, with rising PSA level (6.0 ng/mL) and PSA doubling time of 15 months. ⁶⁴CuCl₂-PET/CT images (axial and MIP) revealed focal and pathologic tracer uptake (arrows) in correspondence to the prostate apex close to the midline 1 h after the injection (a). An important reduction of tracer uptake was observed 4 (b) and 24 h (c) after the injection. Maximum intensity projection (d) visualized the differences in terms of uptake between the organsand prostate relapse