The American College of Raiology (ACR), founded in 1923, is a non-profit professional medical organization composed of diagnostic radiologists, radiation oncologists, interventional radiologists, nuclear medicine physicians, and medical physicists. It is based in Reston, Virginia, with offices in Philadelphia, Pennsylvania, and Washington, D.C. The college publishes The Journal of the American College of Radiology (JACR) and The ACR Bulletin.