[68Ga]-LNTH-2401

This is an open-label, nonrandomized, multicenter study conducted in two sequential parts: an initial Phase 2 Dose Optimization Period followed by the Phase 3 Diagnostic Performance Period. After the optimal administered activity and imaging time window are selected in Phase 2, Phase 3 will enroll participants with recently diagnosed PCa who are at least high risk or have suspected metastatic disease and are eligible for radical prostatectomy with pelvic lymph node dissection (RP+PLND). Safety assessments throughout the study will include monitoring of adverse events, vital signs, ECGs, and clinical laboratory parameters. Participants will be enrolled sequentially in a nonrandomized manner, with competitive enrollment across study sites.