The lateral semicircular canal was displayed on the images of axial CPR,the shortest distance between the facial canal and the lateral semicircular canal was 1.74 + 0.29 mm ,and the second geniculation was 2.47 + 0.51 mm ;

• 轴位重建图像上外半规管位于面神经管上方；在壶腹部与面神经管距离最短(1.；74±0