Preoperative evaluation of neurovascular compression in patients with trigeminal neuralgia by use of three-dimensional reconstruction from two types of high-resolution magnetic resonance imaging

OBJECTIVE: To assess,the value of three-dimensional (3-D) images reconstructed from 3-D constructive, interference in steady state (3-D-CISS) and 3-D fast inflow with steady-state precession Q D-FISP) images for the visualization of neurovascular compression in patients with trigeminal neuralgia. METHODS: Twenty-four consecutive patients with trigeminal neuralgia underwent preoperative 3-D HSP and 3-D-CISS imaging. reconstruction of nerves and vessels was performed,with the use of a volume-rendering,method. We compared the 3-D reconstructed images with intraoperative findings. RESULTS: 3D-CISS and, 3-D-FISP images scanned from the same position clearly delineated the trigeminal nerve and vessels. 3-D reconstructed images showed the spatial relationship between the trigeminal nerve and causative vessels. The responisible arteries were identified from the 3-D reconstructed images, which closely simulated microscopic operative view. CONCLUSION: 3-D-reconstructions from:two types of high-resolution magnetic resonance images (3-D-CISS and 3-D-FISP) are very,useful for creating preoperative simulations and in deciding whether to perform surgery in patients with trigeminal neuralgia.