Intra-arterial treatment (IAT) may damage the arterial vessel wall, which might lead to recurrent thrombosis and distal embolism.In this study the intracranial vessel wall was evaluated in patients with acute ischemic stroke after IAT using high-resolution vessel wall MRI. Thirteen patients underwent both 3T and 7T pre- and postcontrast vessel wall MRI to detect contrast-enhancing lesions. Significantly more enhancing vessel wall lesions and concentric enhancing lesions ipsilateral to IAT were found compared to the contralateral side. The higher number of concentric enhancing lesions ipsilateral to the IAT may be related to the presence of the thrombus and the performed IAT.
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