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Grade 4 stenosis with good correlation in all techniques.
A, Oblique DSA image shows critical stenosis in the right internal carotid artery.
B, Elliptic centric contrast-enhanced MR angiogram depicts the same information.
C, Spiral CT angiogram shows a good correlation with the other imaging techniques. Notice a type 3 calcification in the wall of artery; however, it is sufficiently separated in the reconstruction image.
