ABSTRACT
Though intravenous digital subtraction angiography (IV DSA) has several advantages over conventionalangiography in diagnosis and follow up of various vascular disease, it also has several undesirable problems suchas large volume of the contrast medium and inferior image quality compared to conventional angiography. Sorecently intraarterial digital subtraction angiography (IA DSA) was introduced for better image quality usingsmall amount of contrast medium. The authours had good clinical results IA DSA which were made in 20 patients withour own system, SRM-II, developed by cooperation of Departements of Radiology and Medical engineering, Seoul.National University Hospital. Intraarterial digital substraction angiography was found to have several advantagesover conventional angiography: (a) small amount of contrast medium, (b) reduced need for selective arterialcatheterization,(c) lower film cost, (d) shortened examination time, (e) ability to obtain a “road map”, and (f)easier detection of contrast medium. Also IA DSA has several advantages over IV DSA : (a) less dependency oncardiac output, (b) far less vessel overlapping, (c) reduction in patient motion through less painful procedure byreduced volume of contrast media and shorter imaging time.
Subject(s)
Humans , Angiography , Angiography, Digital Subtraction , Contrast Media , Diagnosis , Follow-Up Studies , Vascular DiseasesABSTRACT
Digital subtraction angiography(DSA) was made in 72 patients at department of radiology, Seoul National University hospital from February 1982 to January 1983 with our system, SRM-II, developed by cooperation of department of medical engineering, Seoul National University Hospital. The results were as follows; 1. In the total 72 cases, vascular disease was 28 cases in which aortic disease including Takayasu's aortitis was 18 cases. Others were vascular tumors in 32 cases and various conditions such as renal donor and artificial arteriovenous shunt. 2. Extent of the lesion was well delineated especially in aortic disease in cluding 8 cases of Takayasu's aortitis, 6 cases of aortic aneurysm and 2 cases of Behcet's syndrome. 3. DSA can be done to outpatient without admission because of its simplicity and non-invasiveness. DSA is useful especially in the evaluation and follow-up of vascular disease and the diagnostic value is expected to grow continuously according to the renewal of system.
Subject(s)
Humans , Angiography, Digital Subtraction , Aortic Aneurysm , Aortic Diseases , Aortitis , Behcet Syndrome , Follow-Up Studies , Outpatients , Seoul , Tissue Donors , Vascular DiseasesABSTRACT
Recently, technical developments in digital electronics and imge intensifier have improved the electronicrecording and processing of images. Both departments of radiology and of medical engineering of Seoul National Univeristy Hospital jointly developed idgital subtraction angiography system(SRM-I) and performed DSA in patients. The system was composed of angiography equipments, computer, video image storage and logarithmic amplifier. Fluoroscopic images were taken before and after 40-60 ml of contrast media were intravenously injected with speedfo 12-15 ml/sec. The images were recorded by V.T.R. with normal speed. The recorded images were processed with digitization, amplification, sutraction, enhancement, position manipulation and image smoothing. Arteriography of neck vessels, abdominal aorta and its branches and extremities were performed successfully by above mentioned methods in 20 cases and results were reviewed.
