Radiologic consideration of intra-arterial digital subtraction angiography

Intra-Arterial Digital Subtraction Angiography(IADSA) was performed in 128 patients during 13-month period. Weexperienced the same advantages of IADSA over conventional film-screen angiography:(1) significant reduction incontrast material dose: 1/3 of the dose of conventional angiography, (2) reduced film cost: 18% of the cost ofconventional technique, (3) decreased need for selective catherization,(4) shortened examination time, and (5)more ready detection of cnntrast material.