Radiology has very wide range of working hours. Also it's very different depending which year you are. Often, the first years (PGY-2) starting out and the graduating class, especially the last six months have it very easy, though there may be exceptions. There are various call schemes among different programs, such as night float vs. no night float system, one resident covering everything vs. one covering one area and another covering another, separate angio call or not, separate CT-US call or not, etc. In programs where there are fewer residents, there will be more frequent call. There are programs that you come work on Saturdays too. Very wide range. For example in my residency, I had to do a couple stretches of q2 call during an outside rotation, added up to more than 120 hours a week. During my nightfloat rotations, I would do either 14 or 28 straight nights without any night off, each night 15 hours. On the other hand, there were many months that I didn't do any call at all and did the usual 7:30 to 6:00 average day. Some rotations, such as interventional started early at 6:00AM. Some other rotations finished late anywhere from 8:00-10:00PM. One easy rotation was from 7:30 to 3:30 or 4:00. So even within a single residency, there was wide variation. When the 80 hr rule came out, our call schedule had to change to be compatible. Overall, you take less call that surgery or some medicine programs. However, the intensity of the call can be very very high, especially in major hospitals and trauma centers. It's not medicine or surgery that can be hit or miss. In these busy centers, you'll be very very busy.