Department of Radiology;
Johns Hopkins Medical Institutions;
Baltimore;
MD 21205;
United States;
Department of Neuroradiology;
Johns Hopkins Medical Institutions;
Baltimore;
MD 21287;
United States;
Department of Radiology;
Johns Hopkins Bayview Medical Center;
Baltimore;
MD 21224;
United States;
Fluoroscopy; Radiology; Radiation; Ionizing; Abdomen; Pelvis; Barium;