I Had to put a bathrobe or gown on, with no shirt, metals, and it was cold being in the basement, and kept cool. They asked if you wanted a blanket. Then you lay down on the slide table, the mask is out on, some get mouth stick too, and physical alignments are made..some get tattoos too, I did. Then the door is closed, and techs Leave, and monitor you by audio and video. The table is repositioned or aligned, and a scan is done. the IMRT UFO hovers around, positions itself, and then zaps you. The number of zaps depends where they are radiating in the H&N, and if bilateral sides, which I had. Took a total of 18 zaps, which was the longest time in the world, by the time I finished, I was sweating, partly due to tumor pain. I did not take Ativan or anything for other reasons. The music was the worst, so ask if you can bring your own. The zaps makes a notable humming noise, but nothing like the MRI, and is painless..at least the process. The radiation is cumulative, so the toxicities will build up, and RO will tell you how to manage them..creams, pain meds, nutrition. The techs helped me off the table since I was always dizzy, and always helped me out. Then once a week, more if needed, you will see th RO. If so equipped, they can spray your mouth a few times a week to help the Mucocitis, , and mine even hydrated you by IV infusion, a few times.

Best of luck!