Fig 4. Patient 30: The white arrows indicate the aneurysms of the medial cerebral artery bifurcation.

Contrary to rDSA (G; 2 aneurysms detected), 3 aneurysms were displayed in 3D-ioUS (H, J, K; 2 on MCA bifurcation and the 3rd aneurysm on M2 branch) as confirmed by the intraoperative view; (rDSA (red), 3D-ioUS (blue, glow- orange)); G: pre-clipping rDSA; H: pre-clipping 3D-ioUS; I: coregistration of G+H; J: MIP 3D-ioUS; K: MIP of 3D-ioUS; L: coregistration of K+H.