They're measuring the quality of patient care.
D002173:Cancer Care Facilities / Q000191:economics; D003362:Cost-Benefit Analysis; D006748:Hospital Departments / Q000191:economics*; D006801:Humans; D009369:Neoplasms / Q000191:economics / Q000532:radiotherapy; D011787:Quality of Health Care; D011871:Radiology; D011872:Radiology Department, Hospital / Q000191:economics*; D011878:Radiotherapy / Q000706:statistics & numerical data; D012955:Societies, Medical; D014481:United States