X ray, 3D CT and navigation oval foramen locations were used in 22, 19 and 4 patients respectively on intractable trigeminal neuralgia in order that the direction and position could be defined.

• 对 4 5例半月神经节定位困难的三叉神经痛病人 ,在射频热凝治疗术中应用X线、三维CT或导航进行卵圆孔定位或在术中验证靶点。