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Overestimation of carotid artery stenosis with magnetic resonance angiography compared with digital subtraction angiography
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Abstract
Three-dimensional time-of-flight (3D TOF) magnetic resonance angiography (MRA) is
generally considered to overestimate the degree of stenosis in the internal carotid
artery (ICA) in comparison with the reference standard intraarterial digital subtraction
angiography (DSA). We evaluated whether the degree of stenosis was more accurately
assessed with 3D TOF MRA if corresponding projections on MRA and DSA were compared
instead of comparison of maximal stenosis at MRA with maximal stenosis at DSA.