Intracranial vessel wall imaging at 3 T and 7 T. Intracranial vessel wall imaging at 3 T and 7 T. Intracranial vessel wall imaging of a 71 year-old-male with a recent left sided ischemic infarction in the anterior circulation (not shown) resulting from symptomatic carotid artery disease. (A) A transverse 3 T contrast-enhanced T1 Volume Isotropically Reconstructed Turbo Spin Echo Acquisition (VIRTA), repetition time 1500 ms, echo time 36 ms, acquired voxel size 0.6×0.6×1.0 mm3, reconstructed voxel size 0.5×0.5×0.5 mm3, field-of-view 200x167×45 mm3, scan duration 6:42 min (Dieleman et al., 2016b). Most of the arterial vessel walls of the circle of Willis are visible and appear to be normal (arrowheads). Blood is more suppressed than cerebrospinal fluid. (B) A transverse 7 T post-contrast T1 Magnetization Preparation Inversion Recovery (MPIR) TSE acquisition, repetition time 3952ms, echo time 37ms, inversion time 1375, acquired voxel size 0.8×0.8×0.8mm3, reconstructed voxel size 0.5×0.5×0.5 mm3, field-of-view 250x250×190 mm3, scan time 10:40 min (van der Kolk et al., 2011,2013) The arterial vessel walls (arrowheads) are better seen due to an improved contrast with blood and cerebrospinal fluid, which is almost completely suppressed.