(UroToday.com) The 2021 American Society for Radiation Oncology (ASTRO) Hybrid Annual Meeting included a joint ASTRO/SNMMI session on prostate cancer molecular imaging and radiotheranostics and a presentation by Dr. Joseph Caster discussing the emerging role of theranostic imaging agents for patients with biochemical failure after radical prostatectomy being considered for salvage external beam radiation. Dr. Caster notes that this talk primarily focuses on Ga68-PSMA PET scans, however, the principles should be broadly applicable to advanced imaging agents for prostate cancer (ie. Axumin, etc).