Fig. 1

Measurement of the in vivo “out of stent” MR artifacts generated by flow diverters. a Patient with a chromium cobalt device. The larger axial slice in the lower part of the figure shows the measurement of the device artifact in millimeters. The point of measurement on the axial slice together with corresponding orthogonal slices (intersection of orthogonal axis, red/blue/yellow lines) are displayed in the upper part of the figure. b Patient with a nitinol device. As noted in the multiplanar images of both patients, the point of the measurement is at the rostral part of the carotid siphon. At this point, the flow diverter is aligned almost parallel to B0 (c)