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Comparison of Magnetic Resonance Angiography, Conventional Angiography, and Duplex Scanning
Stroke 23:341-345, Riles,T.S.,et al, 1992
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Article Abstract
Magnetic resonance angiography correlated exactly with conventional angiography in 39 arteries(52%);duplex scanning correlated with conventional angiography in 49 cases(65%).Compared with conventional angiography,both magnetic resonance angiography and duplex scanning tended to overread the degree of stenosis.The most critical errors associated with magnetic resonance angiography were three readings of total occlusion in vessels found to be patent on conventional angiograms.Although magnetic resonance angiography offers great hope of providing high-quality imaging of the carotid artery with no risk and at less cost,data from this study suggest that misreading the degree of stenosis,or misinterpreting a stenosis for an occlusion,could lead to errors in clinical decisions. Guidelines for use of magnetic resonance angiography in a clinic setting are offered.
 
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