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Digital subtraction angiography: principles, techniques, and applications
Abstract:
Digital subtraction angiography is a safe, rapid, cost-saving procedure that can be performed on an outpatient basis to obtain information comparable to that obtained with conventional angiography. Recent technological developments have allowed greater contrast sensitivity, making DSA a feasible alternative to conventional angiography. Problems with DSA result mainly from patient motion. The overall accuracy of DSA ranges from 97% in the carotids to about 90% in evaluation of main renal artery stenosis. DSA is currently of limited use in evaluation of the pulmonary or coronary arteries.
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