Abstract
Objective: To preoperatively predict the facial nerve location more accurately in patients undergoing surgery for large vestibular schwannoma.
Method: First, three-dimensional (3D) models of arteries and veins around the tumor are combined with contrast-enhanced (CE) fast imaging employing steady-state acquisition (FIESTA) to detect the nerve more accurately. Second, a 3D model of the nerve is constructed to investigate its three-dimensional location. Then, the nerve, which keeps continuity to internal auditory canal or brain stem and runs in the direction of brain stem to internal auditory canal, is recognized as the facial nerve.
Result: Using this method, the facial nerve was detected in seven of 10 patients.
Conclusion: In large vestibular schwannoma, this method can detect the facial nerve more accurately than existing reports.
