title: [Three-dimensional anatomical research on sellar region for transnasal endoscopic surgery].
abstract: OBJECTIVE
  To develop a new method to explore the three-dimensional characteristics of anatomical structures at the sellar region in transnasal endoscopic surgery.
  
  
  METHODS
  (1) The MicronTracker binocular visual navigation system was modified, and the tool's accuracy was tested by comparing the vernier caliper and turntable. (2) The basis nasi plane and median sagittal plane were used as datum plane, S point (the lateral margin point of nasal spine) and M point (maxillary line midpoint) were used as datum point to orientate the structures. The pitching angle, direction angle and distance of the important structures were measured by the tool designed by us based on the MicronTracker binocular visual navigation system and made a computer graphics model.
  
  
  RESULTS
  (1) The tool's accuracy had no statistical difference as compared with vernier caliper and turntable. (2) The pitching angle, direction angle and distance of the important structures were obtained. (3) 3D-max 9.0 and AutoCAD-2008 were used to set up three-dimensional anatomical model of the anatomical structures.
  
  
  CONCLUSIONS
  Based on the familiar point and datum of the skull, the orientation data of the important structures could be obtained and the three-dimensional model of the sella region anatomical structures could be constructed.
authors: Department of Otorhinolaryngology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China.
authors: Guo-dong
authors: GD
authors: Feng
authors: Zhi-qiang
authors: ZQ
authors: Gao
authors: Peng
authors: P
authors: Shen
authors: Yang
authors: Y
authors: Zha
authors: Fang
authors: F
authors: Qi
authors: Hong
authors: H
authors: Jiang
authors: Wei
authors: W
authors: Lü
mesh_terms: D003198:Computer Simulation; D004724:Endoscopy; D006801:Humans; D008866:Microsurgery; D008953:Models, Anatomic; D009666:Nose / Q000601:surgery; D012658:Sella Turcica / Q000033:anatomy & histology; D013101:Sphenoid Sinus / Q000033:anatomy & histology*