Dynamic Contrast-Enhanced MR Angiography and MR Imaging of the Carotid Artery: High-Resolution Sequences in Different Acquisition Planes
Shigeki Aoki
,a,
Hiroto Nakajimaa,
Hiroshi Kumagaia and
Tsutomu Arakia
a From the Department of Radiology, Yamanashi Medical University, 1110 Shimokato, Tamaho-cho, Nakakoma-gun, Yamanashi, 409-3898, Japan.
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FIG 1. Correlation between second-phase (axial) 3D MR angiography and IADSA. Twenty carotid arteries in 15 patients were analyzed
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FIG 2. Correlation between first-pass (coronal) 3D MR angiography and IADSA. Eighteen carotid arteries in 14 patients were analyzed
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FIG 3. Severe stenosis of the left internal carotid artery in a 79-year-old man.
A–D, IADSA image (lateral view) (A); partial MIP image of second-phase (axial) 3D contrast-enhanced MR angiogram (B); partial MIP image of the first-pass (coronal) 3D angiogram (C); source image of the second-phase (axial) 3D angiogram (D). Irregular forms of stenosis are well visualized on axial view; however, coronal view fails to show details of the stenotic lesions, mainly because of low spatial resolution in the anteroposterior direction. A source image of second-phase (axial) 3D angiography clearly shows irregular plaque (arrow, D).
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FIG 4. Marked thickening of left common carotid wall in a 35-year-old woman with arteritis.
A, First-pass (coronal) 3D contrast-enhanced MR angiography shows occlusion of the left common carotid artery (arrow) and the left subclavian artery. The right common and internal carotid arteries are dilated.
B, Source image of second-phase (axial) MR angiography shows marked thickening and enhancement of the wall of the common carotid artery (arrows).
FIG 5. Source image of second-phase (axial) MR angiography shows invasion of the left internal carotid artery by nasopharyngeal carcinoma (arrow)
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