Fig. 1
Discrepancies for 68Ga-PSMA-11 PET/CT without and with CTU in anatomical assignment of tracer accumulation in a patient with multifocal retroperitoneal nodal relapse. a shows focal tracer accumulation in the right iliac retroperitoneum that was assigned to tumor uptake in 68Ga-PSMA-11 PET/CT alone (arrow in a, confidence score 1) and to right ureteric excretion in 68Ga-PSMA-11 PET/CT with CTU (arrow heads in b refer to both ureters, confidence score 3). c again shows focal tracer accumulation in the right iliac retroperitoneum that was assigned to tumor uptake in 68Ga-PSMA-11 PET/CT alone (arrow in c, confidence score 1) and to right ureteric excretion in 68Ga-PSMA-11 PET/CT with CTU (arrow heads in b refer to both ureters, confidence score 3). There is another focal tracer accumulation that was assigned to metastatic disease in 68Ga-PSMA-11 PET/CT without and with CTU (curved arrow in c and d, both confidence score 3)