Figure 4.
Information needed to determine the surgical approach for a left ICA aneurysm (Case 3). (a) MRA showing the left ICA aneurysm (C3 portion). (b) The fusion image of ZTE-based image and MRA depicted clearly that the aneurysm was located intracranially. (c) Fusion image of 3D ZTE-based model and MRA showing the positional relationship between the aneurysm and anterior clinoid process (white arrow: aneurysm, yellow dashed arrow: anterior clinoid process).