Donna, My IMRT simulation was about 45 minutes but the actual treatment lasts 20 minutes. When they do xrays at the beginning and end of the week, it is half an hour. They also usually count off for me over the intercom how many positions the machine goes through. There are nine sets of positions, it's hard for me to keep track of on my own but when they stay "starting number 7" I know I'm in the last part of the treatment and that helps me. Perhaps you can get them to do something like that for you if you think it would help.