title: [Characteristic of the vertical and pyramidal segment of facial nerve canal].
abstract: OBJECTIVE
  To study the vertical and pyramidal segment of facial nerve canal based on three-dimensional reconstruction of temporal bone CT, and provide a quantitative data for the middle ear and mastoid surgery.
  
  
  METHODS
  Reconstruction of adult axial CT images shows the vertical and pyramidal segment of facial nerve canal. Using the Able Software 3D-DOCTOR 3.5 to show and measure the angle of the vertical and pyramidal segment of the facial nerve canal and to analyze the features and regularity based on the measured data.
  
  
  RESULTS
  According to the angle of the vertical and pyramidal segment of facial nerve canal based on the three-dimensional reconstruction model. A certain regularity has been found in the direction and the angle of different segments of the vertical and pyramidal segment of facial nerve canal.
  
  
  CONCLUSIONS
  The temporal bone CT three-dimensional reconstruction can accurately show the characteristic and angle of the vertical and pyramidal segment of facial nerve canal. The characteristics and quantitative angle of the vertical and pyramidal segment of facial nerve canal from the anatomical viewpoint for clinical utility could keep the vertical and pyramidal segment of facial nerve from injury in temporal bone surgery.
authors.affiliation: Surgery of Ear Skull-base, Affiliated Eye Ear Nose Throat Hospital, Fudan University, Shanghai, 200031, China.
authors.forename: Yusu
authors.initials: Y
authors.lastname: Ni
authors.forename: Huawei
authors.initials: H
authors.lastname: Li
mesh_terms: D000328:Adult; D004432:Ear, Middle / Q000000981:diagnostic imaging; D005154:Facial Nerve / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008297:Male; D008416:Mastoid / Q000000981:diagnostic imaging; D008875:Middle Aged; D013701:Temporal Bone / Q000000981:diagnostic imaging*; D036542:Tomography, Spiral Computed; D055815:Young Adult