Recently, technical developments in digital electronics and intensifier have improved the electronic recording and processing of images. Both departments of radiology and of medical engineering of Seoul National University Hospital jointly developed digital subtractio angiography system (SRM-I)and performed DSA in patients. The system was composted of angiography equipments, computer, video image storage media were intravenously injected with speed of 12-15ml/sec. The images were recorded by V.T.R. with normal speed. The recorded images were processed with digitization, amplification, subtraction, enhancement, position manipulation and images smoothing. Arteriography of neck vessels, abominal aorta and its branches and extremities were performed successfully by above mentioned method in 20 cases and results were reviewed.