Timing of chest x-ray exposures in relation to the cardiac cycle.
D000328:Adult; D001022:Aortic Valve Insufficiency / Q000000981:diagnostic imaging; D002648:Child; D004562:Electrocardiography; D006322:Heart Aneurysm / Q000000981:diagnostic imaging; D006350:Heart Valve Prosthesis; D006801:Humans; D008944:Mitral Valve Insufficiency / Q000000981:diagnostic imaging; D013902:Radiography, Thoracic; D013679:Technology, Radiologic; D013997:Time Factors