The 38,000 members of the American College of Radiology include radiologists, radiation oncologists, medical physicists, inte ... rventional radiologists and nuclear medicine physicians. For over three quarters of a century, the ACR has devoted its resources to making imaging safe, effective and accessible to those who need it. The mission of the ACR is to serve patients and society by maximizing the value of radiology, radiation oncology, interventional radiology, nuclear medicine and medical physics by advancing the science of radiology, improving the quality of patient care, positively influencing the socio-economics of the practice of radiology, providing continuing education for radiology and allied health professions and conducting research for the future of radiology. read more