KLK3 and posterior cortical atrophy: In the present study, we found a higher PCa recurrence detection rate for FCH PET/MRI than for PET and MRI alone (74.3% vs. 37.1% and 65.7%, respectively), particularly in patients with PSA levels > 0.5 ng/mL—though an acceptable detection rate was also achieved in patients with very low PSA levels (58%).