To study the anatomy and multimodal image fusion of the trigeminal nerve, in order to provide a basis for clinical minimally invasive interventional treatment strategies for trigeminal neuralgia.

Dissected the general structure of the trigeminal nerve and its positional relationship with adjacent structures, and used computed tomography and MRI to image the trigeminal nerve, and then performed CT/MRI image fusion.

The Gasserian-ganglion of the trigeminal nerve was located in the Meckel's cavity, outside the dura of the middle cranial fossa, and the three branches of the nerve fibers were intertwined. CT can only clearly show the bony structures adjacent to the Gasserian-ganglion but not the Gasserian-ganglion in the body. MRI was just the opposite. The bony structure was blurred, but the Meckel's capsule and nerve roots where the trigeminal nerve was located can be clearly distinguished. CT/MRI image fusion can make the two advantages complementary.

Based on the anatomical structure and position of the trigeminal nerve, it is difficult to achieve highly selective branch treatment of trigeminal neuralgia with radiofrequency in the Gasserian-ganglion; For the treatment of trigeminal neuralgia with percutaneous microballoon compression on the Gasserian-ganglion, the balloon catheter should be placed into the Meckel's cave, but it is not necessary to insert into the Meckel's capsule, and the depth of the balloon catheter should be that the distal end is flush with the top of the temporal bone petrous cone.

Computed Tomography, X Ray; Magnetic resonance imaging; Image fusion; Trigeminal neuralgia