Most radiologists work from 50 hours to 60 hours per week with the most of them working 50 hours per week.
If the radiologist is working in a hospital where there's more of a population then they would be working more often and are likely to work as much as 60 hours per week.
Radiologists are a high paid doctor though too so it's worth the working hours as you can earn as much as $300,000.00 per year being a radiologist.
It takes 12 years though of college to become a radiologist but they will be in demand for years and if you can afford to go to college for it and are ready to put in the commitment it can be a good career path.