PMC9833881_01
A and C: Axial T2-FLAIR sequences. Hyperintense lesions were present in the bilateral temporal lobe, with white-matter involvement more prominent in the right than in the left hemisphere. Increased T2-FLAIR signals were observed in the sulci and adjacent cortical areas of the right hemisphere. B and D: The lesions in the brain parenchyma and the sulci of the right hemisphere were improved, and the enhancement was no longer present. E, F, I, and J: The walls of the BA and right-side MCA were thinner than at presentation, and the enhancement was reduced (arrows). G: HR-VWI indicated segmental wall thickening of the right MCA and circumferential enhancement with a significant "double-track sign" (arrows). H: Magnetic resonance angiography indicated mild stenosis of the right MCA (arrows). BA, basilar artery; HR-VWI, high-resolution MRI vessel-wall imaging; MCA, middle cerebral artery; T2-FLAIR, T2-weighted fluid-attenuated inversion recovery.
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F1
However, the extent of vessel-wall thickening that occurred due to vasculitis was reduced, and the degree of enhancement was diminished (Fig. 1B, D, F, and J).