The Ontario Association of Radiologists (OAR) is a non-profit, voluntary professional association that represents more than 700 radiologists working in hospitals and community clinics in Ontario.

Established in 1949, the OAR has taken an active and leadership role in promoting the speciality and has contributed to the advancement of technology in diagnostic imaging procedures in the medical community and health care system. The OAR is an advocate for quality patient care with regard to both the diagnostic imaging and interventional radiology services provided in Ontario hospitals and Independent Health Facilities located across the province.

The organization is devoted to representing both the public and its members in the advancement of medical technology and the promotion of high quality patient care through improved access to medical imaging services including x-ray, mammography, ultrasound, bone mineral densitometry (BMD), nuclear medicine, Computed Tomography (CT), Magnetic Resonance Imaging (MRI) and interventional radiology procedures.

In order to ensure that patients have access to the diagnostic imaging tests, and that new modalities are available in our health care system, the OAR regularly consults with, and is consulted by, the Ontario Ministry of Health, the Ontario Medical Association, the Ontario Hospital Association and many other radiology organizations and health organizations on a provincial, national and international level.

The OAR has worked closely with the Ministry of Health to improve patient access to CT and MRI scanners to develop an approval process which has resulted in a major expansion of these state-of-the-art imaging technologies.