Buckeye, Photon beam radiation therapy is another name for what is usually known as external beam radiation therapy. I believe @hodagwi @remoteman7 @jap57 @jimb1950 @norske46 @gmack have had external beam radiation.

You may also wish to see these related discussions:
- Questions about radiation, post radical prostate surgery https://connect.mayoclinic.org/discussion/post-radical-prostate-surgery/

– Prostate cancer treatment: stereotactic body radiation therapy https://connect.mayoclinic.org/discussion/prostate-cancer-treatment/

How are you after four years?
I had SBRT five treatments from April 9 to 21 this year. Unremarkable experience during my treatments. For a few days after the last treatment, I noticed some mucus and traces of blood in my stool. I reported it to my RO but apparently it wasn't a cause for concern; it cleared by itself. I received a comment that my experience indicated some radiation damaged on my rectum, it was self-healing but the blood veins were still sensitive hence the stool picked up some blood as itovef past the rectal area
I had no SpaceOAR -- this may or may not have prevented the bleeding. I received another comment that if the bleeding comes back after 8 months, it would be a concern. I'm now 2-1/2 months post-SBRT, surprisingly still having infrequent, spontaneous erections after 3-1/2 months of ADT (Orgovyx) but I have little or no libido (Testosterone 0.36 as of July 7 test). Nothing else to report.