@dantewedge

My husband had VMAT RT so it might be different how the whole process looks like.

We were explained that RO makes original mapping and decides where and how much of a boost is done, physicists do Gys calculations and program the field , and tech group administers radiation. Tech group "presses the button", so to speak after they adjust your position and check that programed field is aligned with your position, bladder is full and rectum empty, gold markers aligned with initial simulation CT. They might be the last in a group but they are equally important in the whole process.

Our RO was exceptional in his care and involvement because he was involved every day and checked if positioning is good and he did it this way: technicians would make initial CT, than they would send that image to RO and if he OK-yed it, than tech would "press the button". It was like that every single day. That is rarity - many ROs do not do that nor ever meet in person with a patient during RT program. Our RO met with my husband every week to go over his vitals and ask about possible SAs etc even though my husband had none till the very last 4 days when he had some night urgency (that was resolved by AZO supplement ( one with pumpkin seeds and soy).

My husband did not have any enema since he is very "regular" and had BM every morning naturally but if you need to have one to make sure that bowels are clear there is no reason IMHO not to have it, especially since you have only 4 sessions total.

SBRT to my understanding is much stronger RT and can cause some more irritation initially, but on the long run results are almost the same.

I hope this was of some help , although I know that our RO is more of an exception than a rule - I am forever grateful to him and his care. His kindness and dedication was the reason why we chose him over more senior RO. I just had enough of my husband being treated like he has "regular" PC and not very aggressive one. I knew that this RO would go above and beyond in his care and it proved to be true.

Wishing you the best of luck with your RT and as soon as you finish that start with taking Vit C and E supplements - you might want to read those studies :
https://hospitalhealthcare.com/specialisms/oncology/can-dietary-fibre-mitigate-prostate-cancer-radiotherapy-side-effects/
https://www.sciencedirect.com/science/article/pii/S2666555724000303
https://acsjournals.onlinelibrary.wiley.com/doi/full/10.3322/canjclin.51.4.209
https://pmc.ncbi.nlm.nih.gov/articles/PMC4254677/