A Century of Leadership in Radiology

Since its founding in 1923, the American College of Radiology has played a defining role in shaping the practice of radiology and advancing medical care. Established by early leaders in the field, the ACR was created to promote professional standards, scientific excellence, and the responsible use of medical imaging at a time when radiology itself was still emerging.

Over the decades, the College has evolved alongside extraordinary advances in medicine. ACR members have helped drive progress in diagnostic imaging, radiation therapy, and interventional procedures—transforming how diseases are detected, treated, and monitored. Through periods of rapid technological change, the ACR has remained focused on quality, patient safety, and evidence-based care.

From developing accreditation programs and clinical guidelines to advancing education, research, and advocacy, the ACR’s history reflects a sustained commitment to leadership and accountability. Its members—physicians, scientists, and educators—have worked collectively to ensure that innovation in radiology improves patient outcomes while upholding the highest professional standards.

This legacy spans more than a century of milestones and moments that have shaped both the organization and the field itself. Explore the ACR historical timeline to see how key developments, achievements, and leadership efforts have defined the College’s role in advancing radiology over time.