Stereoscopic technique in digital subtraction angiography.

Stereoscopic technique was applied to digital subtraction angiography (DSA) with alternate exposures from twin focus spots (6.5-cm separation) of an x-ray tube. Correct identification of two crossed aluminum wires was obtained more than 90% of the time when there was separation of more than 5 mm. Excellent clinical images of intravenous as well as intraarterial DSA have been obtained, and the clinical value of DSA was enhanced by application of the stereoscopic technique.