|
FIG 4. A 59-year-old man with carotid and vertebrobasilar disease.
A, CE MRA coronal MIP (3D FLASH, TR/TE, 4.36/1.64; flip angle 25°; bandwith, 432 Hz; matrix 136 x 512; field of view, 165 x 330 mm; slab thickness, 70 mm; partitions, 80; and voxel size of 1.33 x 0.64 x 1.15 mm3) of the carotid system showing high grade stenosis of the proximal left internal carotid artery (large arrow), with moderate stenosis involving the proximal right internal carotid artery (small arrow).
B, CE MRA coronal MIP of the vertebrobasilar system with carotid vessels edited away demonstrates segmental occlusion of the right V1 segment (large arrow) with reconstitution distally and mulitfocal stenoses in V3 and V4 segments (small arrows). There is also a proximal left subclavian stenosis (open arrow).
C, Selective DSA of the right carotid artery confirms stenosis in the proximal right internal carotid (arrow).
D, Aortic arch angiography demonstrates focal stenosis of proximal left subclavian artery (arrow).
E, Delayed image of DSA run confirms multifocal stenotic disease in the right V3 and V4 segments (small arrows), as well as segmental occlusion in the right V1 segment (large arrow).
|