title: Morphologic measure of retrosigmoid approach using volume rendering with thin-section computed tomography.
abstract: OBJECTIVE
  The objective of this study was to research the jugular foramen, internal auditory pore, and the turning point between its components using imageological methods and provide theoretical basis for retrosigmoid approach.
  
  
  METHODS
  A total of 100 cases of adult hip computed tomographic scans were reconstructed. α, β, AC, AB, BC, and the shortest distance were measured.
  
  
  RESULTS
  The angle α was measured as 39.50 (4.74) degrees (range, 29.3-48.5 degrees; 95% confidence interval [CI], 38.64-40.35 degrees). The angle β was measured as 46.35 (5.51) degrees (range, 31.09-64.74 degrees; 95% CI, 45.35-47.35 degrees). The distance of AC was measured as 44.94 (3.84) mm (range, 34.9-54.9 mm; 95% CI, 44.25-45.64 mm). The distance of AB was measured as 43.68 (4.56) mm (range, 33.8-54.7 mm; 95% CI, 42.86-44.51 mm). The distance of BC was measured as 6.15 (2.04) mm (range, 2.7-14.7 mm; 95% CI, 5.78-6.52 mm). The safe distance was measured as 5.21 (0.23) mm (range, 0.84-12.92 mm; 95% CI, 5.17-5.25 mm).
  
  
  CONCLUSIONS
  These previously mentioned results can help to locate these structures in the measurement plane and provide reference for surgery.
authors: From the Basic Medical College of Bethune Medical Department, Jilin University, Jilin, China.
authors: Xiangliang
authors: X
authors: Liu
authors: Yu
authors: Y
authors: Chen
authors: Li
authors: L
authors: Li
authors: Mingzhen
authors: M
authors: Yuan
authors: Jie
authors: J
authors: Gao
authors: Wenchao
authors: W
authors: Zhao
authors: Yong
authors: Y
authors: Tian
authors: Youqiong
authors: Y
authors: Li
mesh_terms: D000328:Adult; D002508:Cephalometry / Q000379:methods; D003392:Cranial Sinuses / Q000000981:diagnostic imaging; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D009777:Occipital Bone / Q000000981:diagnostic imaging; D010579:Petrous Bone / Q000000981:diagnostic imaging*; D013701:Temporal Bone / Q000000981:diagnostic imaging*; D014057:Tomography, X-Ray Computed / Q000379:methods*; D055815:Young Adult