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MR Angiography at 3 T for Assessment of the External Carotid Artery System

¹ All authors: Department of Radiological Sciences, David Geffen School of Medicine, University of California Los Angeles, Peter V. Ueberroth Bldg., Ste. 3371, 10945 Le Conte Ave., Los Angeles, CA 90095-7206.

View larger version (39K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 1 —56-year-old woman with clinically suspected supraaortic arterial occlusive disease. Typical high-resolution contrast-enhanced MR angiography performed on 3-T system shows anteroposterior coverage of external carotid artery system obtained when coronal source data acquisition is used.

View larger version (41K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 2 —46-year-old woman with neurologic symptoms. Coronal contrast-enhanced MR angiography is sufficient to show presence of large arteriovenous malformation (arrowhead), although this lesion was incompletely imaged because of limitations in through-plane coverage. Note presence of dorsal draining vein (arrow) that is incompletely depicted.

View larger version (29K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 3 —Volume-rendered maximum-intensity-projection image acquired during sagittal contrast-enhanced MR angiography in 69-year-old woman with clinically suspected supraaortic arterial occlusive disease illustrates high degree of vascular branch vessel depiction obtained.

View larger version (87K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 4 —Thin maximum-intensity-projection sagittal reconstruction in 42-year-old man with clinically suspected supraaortic arterial occlusive disease exemplifies spatial resolution achieved using technique described. Noted are separate origins of superior thyroid (S. Thy.), lingual (Ling.), facial (Fac.), and maxillary (Max.) arteries in this example. S.T. = superficial temporal artery, P.A. = posterior auricular artery, Occ. = occipital artery.

View larger version (13K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 5 —Branching patterns of external carotid artery. M = maxillary artery, F = facial artery, L = lingual artery, ST = superficial temporal artery.

View larger version (41K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 6 —Left external carotid artery branches as seen on volume-rendered maximum-intensity-projection image in 72-year-old woman with clinically suspected supraaortic arterial occlusive disease. Note common origin of lingual (arrow) and facial (arrowhead) arteries, consistent with truncus linguofacialis.

View larger version (43K): [in this window] [in a new window] [as a PowerPoint slide]   Fig. 7 —32-year-old woman with moyamoya disease and resultant distal left internal carotid artery occlusion (arrow). Imaging using sagittal data acquisition technique described allowed confident assessment of integrity of surgically created superficial temporal-to-middle cerebral artery bypass, which was determined to have focal critical stenosis in its mid portion (arrowhead).

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