@cactusk I did the DIBH. I still have my snorkel though I had 25 rounds. I uses to count in my the breath in and hold now breath normally and i still remember it was 9 times each session. I also got to choice of music. I didn’t get any burn prevention but it was back in 2017. I went into everything a bit blindsided to it all. I know a lot more now its called hindsight. 1 funny thing was i used to have the hiccups after the session was finished. They didn’t start straight away. The rad oncologist brushed it off as nothing to do with the treatment he didn't even check how my skin was holding up it was the girls setting me up each time who spotted the blisters and called the head nurse in. That was the only bad experience in that part of my initial treatment. Had to deal with him 3 years later and he was just as dismissive so I dismissed him and requested someone else. Turned out he was wrong when i saw the new one she spotted the problem immediately. Its great that we have that choice even going public.
I wish i could have practiced the breathing part before I started rads.
Just remember moisturise heaps no powder no deodorant. Im sure they will have told you all that and gentle wash. I remember they were very particular about what moisturiser i used etc. they actually gave me tube after tube of it
good luck with it the 12 sessions will pass quickly