1 ﹒颞叶temporal lobe。2 ﹒桥小脑角pontocerebellar angular。3 ﹒面神经facial nerve。4 ﹒小脑天幕tentorium of cerebellum。5 ﹒小脑半球cerebellar hemi sphere。6 ﹒小脑前下动脉inferior anterior cerebellar artery。4 ﹒小脑半球cerebellar hemisphere。图1‐142内听道中段oblique sagital MR image through IAC par ......