FOLH1 and prostate carcinoma: This study compared radiation-related metrics for prostate cancer PET/CT using [^68 Ga]Ga-PSMA and [^18F]F-Choline and examined whether kidney SUVmax is associated with the exam effective dose (ED_total, mSv), while characterizing ambient dose-rate (μSv/h) at standardized distance/time as an exploratory safety metric.