Treatment times will vary depending on the fractional dose prescribed. I have heard of treastment times as short as 10-15 minutes. Mine was more like 35 minutes and longer when they did the weekly x-ray shots. I made my own CD of thumpin' gospel and Christian music and I knew exactly where I was in the treatment based on what song was playing. My treatment protocol was only 8 positions. You will also know where you're at timewise by the gantry position.

Be sure to check the computer monitor that your name is on it. There have been a few instances where people got the wrong treatment program. One gal here got radiated for prostate cancer once when the patient before her didn't show up. In many institutions the rad machines are run 12-14 hours a day.