Metabolic Response after 68Ga-Psma-pet/ct-directed IGRT/SBRT for Oligometastases Prostate Cancer

We used 68Ga PSMA PET/CT in the current investigation to assess the metabolic response and local control of metastasis in patients with oligometastatic prostate cancer receiving SBRT. We performed a retrospective evaluation of the medical data of all patients with oligometastatic prostate cancer who underwent stereotactic body radiation therapy (SBRT) between 2017 and 2021. Our analysis only included medical records of patients who had SBRT for oligometastatic prostate cancer and had pre and post-SBRT 68Ga PSMA PET/CT images. Patient-related (age), disease-related (Gleason score, location of metastases), and treatment-related (factors and outcomes) data were collected from the medical files. A total of 17 patients (28 lesions) with a median age of 69 years were included in the research. A median follow-up of 16.6 months was used (range 6–36 months). The median follow-up period for 68 Ga PSMA PET/CT was 8 months (the range was 5–24 months). The median pre-treatment PSA level was 1.7 ng/mL (range 0.39–18.3 ng/mL) compared to the post-treatment PSA nadir of 0.05 ng/mL (0.02–4.57). During the follow-up period, local control was 96