Radiology seems to be the only medical field in which the gender pay gap hasn’t made itself at home, according to a new study by Harvard Medical School. Female radiologists tend to make more than male radiologists, researchers found.

Women doctors working in other specialties aren’t so lucky. On average, they seem to make about $20,000, or 8 percent, less per year than their male counterparts. The disparity was especially noticeable in orthopedic surgery, gynecology and cardiology, but smaller in emergency care and family medicine.

Still, that 8 percent gap is smaller than the approximately 21 percent gap the U.S. Census Bureau estimates for much of the rest of the American workforce.

Check out the study’s full results and methodology at Boston’s CBS4.