Arjen Lindenholz

168 CHAPTER 7 Figure 2 . An 85-year-old male with an occlusion of the left M1-M2 segment (arrow), successfully treated with a thrombosuction device (patient number 9 in Table 2 ). ( A ) Digital subtraction angiography directly before and after thrombectomy procedure. ( B ) Subtraction image from coregistered pre- and postcontrast vessel wall images confirms a hyperintense configuration at the thrombectomy site. The transverse pre- ( C ) and postcontrast ( D ) magnetization-prepared inversion recovery turbo spin-echo (MPIR-TSE) vessel wall images at 7T (voxel size 0.8 x 0.8 x 0.8 mm 3 ) were obtained 22 days after thrombectomy procedure. The eccentric vessel wall enhancement present after contrast administration is at the same location as the thrombectomy site (arrow) ( D ).