Fig 2. Patient 17: The black arrow indicates M2 segment (temporal branch of MCA) of the medial cerebral artery, vasospasm of M2 segment visualized in post-clipping 3D-ioUS (E) which led to repositioning of the clip; (rDSA (red), 3D-ioUS (blue, orange); A: pre-clipping conventional DSA; B: pre-clipping rDSA; C: pre-clipping 3D-ioUS; D: post-clipping conventional DSA; E: post-clipping 3D-ioUS; F: coregistration of C+E.