Arjen Lindenholz

169 MRI Vessel Wall Imaging after Intra-Arterial Treatment for Acute Ischemic Stroke 7 Figure 3 . A 72-year-old female with an occlusion of the right M1 segment, successfully treated with a thrombosuction device (patient number 11 in Table 2 ). Digital subtraction angiography directly before thrombectomy procedure shows an acute occlusion in the right middle cerebral artery ( A; arrow). ( B ) Subtraction image from coregistered pre- and postcontrast ( C and D ) vessel wall images confirm a hyperintense rim (arrow) at the vessel wall. Transverse pre- ( C ) and postcontrast ( D ) magnetization- prepared inversion recovery turbo spin-echo (MPIR-TSE) vessel wall images at 7T were obtained 25 days after the thrombectomy procedure. The area of eccentric vessel wall enhancement ( D ) is seen in the right M1-segment, at the same location as the thrombectomy site, confirmed on the subtraction image in B (arrows).