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Pseudoaneurysm: Axial T1-weighted fat-saturated image through the upper neck demonstrates dissection of the left internal carotid artery cervical segment with narrowing of the flow-related signal void and a crescentic hyperintense rim (red arrow), compatible with hemorrhage in the subintimal space or false lumen. There is focal dilation at this level, likely representing a thrombosed pseudoaneurysm. The normal right ICA is also visualized (blue arrow). ICA, internal carotid artery.
