Figure 2
Maximum intensity projection (A) and thin coronal reconstruction images (B) from two-dimensional 'time of flight' magnetic resonance angiography show no flow in the brachiocephalic artery (a) beyond the origin. The origin of left subclavian artery (b) does not show a flow signal. The left common carotid artery (c) shows a streaky flow. The image in (A) shows multiple collateral vessels (d) along with normal flow in bilateral vertebral arteries (e). Axial reconstruction image (C) shows diffuse wall thickening of arteries with luminal narrowing.