The median and mean cpm were overall significantly higher in needles with PCa (119 cpm; mean 263 cpm ± 395.7) compared to needles without PCa (64 cpm; mean 73 ± 44, p < 0.001), as shown in Fig. 2B. Further, we observed a positive correlation between ISUP grade at pathology and cpm (r = 0.431, p < 0.001), as shown in Fig. 2C. In Fig. 3, we report examples for true and false positive/negative needles, with the results from the gamma counter, the corresponding histopathology, and PSMA IHC. This evidence concerns the gene FOLH1 and posterior cortical atrophy.