Used in nuclear medicine for PET imaging to detect prostate cancer lesions. Binds to prostate-specific membrane antigen (PSMA), which is overexpressed in prostate cancer cells. Enables visualization of primary and metastatic tumors, guiding diagnosis, staging, and treatment planning. Particularly useful in identifying recurrence after prostatectomy or radiation therapy. Administered with a radioactive tracer, typically gallium-68, for high-contrast imaging.