FOLH1 and prostate carcinoma: Hence, inhibitors of PSMA with a similar structure have attracted a great amount of attention for prostate cancer diagnosis and radioligand therapy, and are conjugated with various radionuclides (99mTc, 64Cu, 177Lu, 45Ti, 111In, 18F, 68Ga) [12,13,14,15,16,17,18,19,20,21].