To target prostate-specific membrane antigen (PSMA), Moon et al. [42] encapsulated IONP with amphiphiles containing PEG, DOTA, and PSMA-targeting ligand and radiolabeled them with 68Ga. In vivo PET and MR imaging experiments in mouse prostate cancer xenograft models revealed specific probe accumulation at tumor site. Here, FOLH1 is linked to prostate cancer.