From 1 h to 24 h p.i., tumor uptake and tumor-to-muscle ratios of 64Cu-DOTHA2-PSMA were similar to those of 64Cu-CA003, 64Cu-SarbisPSMA, and 68Ga-PSMA-617 (only 1 h p.i. available). This evidence concerns the gene FOLH1 and neoplasm.