Dr. John J. Cronan is a graduate of Providence College in 1972. He then graduated from Albany Medical College of Union University in 1976. He completed his radiology residency training at Yale-New Haven Hospital, where he was chief resident in 1980. Dr. Cronan then completed a two-year fellowship, junior staff position at Massachusetts General Hospital from 1980-1982. During that time he was trained in abdominal imaging.

Dr. Cronan arrived at Rhode Island Hospital in 1982. He has held the position of program director and vice chairman. He helped formulate and develop the Department of Diagnostic Imaging at Brown University. He was appointed Radiologist-in-Chief and Chairman of the Department of Diagnostic Imaging at Brown Medical School in 1994. His clinical interests and research interests are in the area of renal obstruction and non-vascular intervention.. He has a particular interest in ultrasound and its application in genitourinary imaging. Dr. Cronan is past president of the Society of Uroradiology and is a fellow of the Society of Radiologists in Ultrasound. He has published over 180 peer reviewed scientific articles and lectured nationally.