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October 1, 1982

Few vessels hide from digital angiography

JAMA. 1982;248(13):1554-1555. doi:10.1001/jama.1982.03330130014005

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Since its introduction into clinical use just over two years ago (JAMA [MEDICAL NEWS] 1980;244:531), digital subtraction angiography (DSA) has become a standard form of arterial examination in several situations (JAMA 1982;247:3213-3216, 248:671-674). In the estimate of radiologist Patrick Turski, MD, of the University of Wisconsin Medical School in Madison, "probably hundreds of these instruments have been purchased or installed in the last year."

Turski and his colleagues are representative of radiologists at institutions across the nation who are continuing to extend the usefulness of this new imaging mode. Applications now under development include selective intra-arterial injections for viewing the intracranial arteries and the aortic arch and dynamic studies of heart function.

In DSA, a digitized image of the field to be examined is electronically stored for use as a subtraction mask. Normally, contrast material containing iodine is injected intravenously (IV), and digitized images of the opacified arterial, capillary or