Welcome to the fifth annual radiology-group survey results. A different approach in gathering information was used this year. In the past, the survey was 100% based on submissions provided by the groups themselves. This year, the Radiology Business Journal staff researched the practice market and sought out large groups, asking them to submit information. Some entries were based on information taken from the groups’ websites. The results look complete and do represent the largest 100 radiology groups owned by radiologists in the country.