Abstract
In patients with cerebral aneurysms around the optic nerve, preoperative recognition of the interaction between the optic nerve and the aneurysms will contribute to visual preservation following surgery. The aim of this study was to introduce the value of multimodality fusion imaging in order to visualize the relationship between the aneurysm and the optic nerve.
Three patients with cerebral aneurysm around the optic nerve underwent computed tomography angiography (CTA) and cycled Fast Imaging Employing Steady-state Acquisition (FIESTA-c) sequence. Fusion imaging of both was created using a workstation (Ziostation; Ziosoft Inc., Tokyo, Japan). We evaluated the preoperative deformation of the optic nerve compressed by the aneurysms using the fusion imaging. All magnetic resonance imaging examinations were performed using a 3.0T Signa HDx scanner (GE Medical Systems Milwaukee, WI, USA) with an 8-channel head coil. A CT examination was performed using a multidetector row CT scanner (GE Light Speed VCT; GE Healthcare, Milwaukee, WI, USA). The optic nerves were distinguished from aneurysms using fusion imaging, and this technique allowed visualization of optic nerve deformation induced by the aneurysm.
Fusion imaging was useful for demonstrating the optic nerve status when surrounded by aneurysms. It was also useful in establishing a surgical strategy, enhancing intra-operative spatial orientation and increasing surgeon’s confidence.
