Dr. Shadpour Demehri

Dr. Grafe (Gray) Lyons is a specialist in vascular and interventional radiology. His clinical focus is in the diagnosis and treatment of arterial and venous vascular disease and minimally-invasive, image-guided procedures. Dr. Lyons earned a B.S. from Davidson College and M.D. and Ph.D. degrees from Duke University in North Carolina. He completed internship in general surgery and residency in radiology at NewYork-Presbyterian Hospital/Weill Cornell Medicine in New York. He then completed fellowship in vascular and interventional radiology at the Miami Cardiac and Vascular Institute in Florida. Dr. Lyons joined the faculty at Johns Hopkins Medicine in 2019 as an Assistant Professor of Radiology and Radiological Science in the Division of Vascular and Interventional radiology. Dr. Lyons is rated as an Advanced provider by MediFind in the treatment of Mesenchymoma. His top areas of expertise are Undifferentiated Pleomorphic Sarcoma, Mesenchymoma, Bile Duct Stricture, Gastrostomy, and Liver Embolization.

Dr. Kronthal joins the Johns Hopkins Community Radiology division from Drs. Groover, Christie and Merritt (GCM), where he has practiced at both Sibley and Suburban Hospitals for more than eleven years. He received his Bachelor of Arts at Haverford College in 1983 and medical degree at the University of Virginia in 1987. Dr. Kronthal performed both his radiology residency and Body Imaging fellowship at Johns Hopkins Hospital from 1998 through 1993. Following his fellowship, he spent twelve years with WBA Imaging, during which time he served as Chairman of the Department of Imaging at Prince George’s Hospital Center. Dr. Kronthal was with GCM from 2005 – 2017 and is the incoming Chairman of Radiology at Sibley Hospital. He is a past president of the District of Columbia Metropolitan Radiological Society. He was awarded fellowship in the American College of Radiology in 2005. Dr. Kronthal is rated as an Advanced provider by MediFind in the treatment of Mesenchymoma. His top areas of expertise are Muscle Invasive Bladder Cancer, Pleurisy, Pleural Effusion, and ALK-Positive Non-Small Cell Lung Cancer.

Dr. Kelvin K. Hong is an Associate Professor and Executive Vice Chair of Radiology within the Johns Hopkins Department of Radiology. A specialist in interventional and vascular radiology, Dr. Hong serves as the Medical Director of the Johns Hopkins Interventional Radiology Center. Dr. Hong earned his medical degree from South Africa’s University Of Witwatersrand Medical School in Parktown. He completed a radiology residency at Parktown West’s College of Medicine/Radiology, as well as a cardiovascular/interventional radiology fellowship and diagnostic radiology residency at The Johns Hopkins Hospital. His areas of clinical expertise include bone, liver and soft-tissue tumors; chronic total occlusions; claudication; deep venous thrombosis; lung, esophageal and kidney cancer; peripheral arterial/vascular disease; renal artery/vascular disease; uterine fibroid tumors; varicocele; and vascular malformations and venous thromboembolism. Dr. Hong performs procedures that include radiofrequency ablation for lung, liver, kidney and bone lesions; transcatheter arterial chemoembolization for liver cancer; lower-extremity angioplasty and stenting; visceral angioplasty and stenting; embolization of uterine fibroid tumors; cryoablation for pain control; and percutaneous laser ablation of varicose veins. Dr. Hong served as editor for the book Percutaneous Tumor Ablation and contributed to Interventional Oncology: Principles and Practice. Dr. Hong is rated as a Distinguished provider by MediFind in the treatment of Mesenchymoma. His top areas of expertise are Fibrolamellar Carcinoma, Bile Duct Obstruction, Neuroendocrine Tumor, Liver Embolization, and Pancreaticoduodenectomy.