title: [The study of automatic cephalometric analysis system].
abstract: OBJECTIVE
  To develop a system of automatic cephalometric analysis and compare the reliability of the computer software systems (ACAS and OSPES).
  
  
  METHODS
  The establishment of the ACAS computer software system by image processing technique was introduced. 15 cephalograms were used for comparing the reliability of cephalometry between ACAS and OSPES.
  
  
  RESULTS
  The results shown that the ACAS is more reliable for soft tissue profile measurement than OSPES.
  
  
  CONCLUSIONS
  The application of ACAS would supply a valuable measurement tool for orthodontics and orthognathic surgery.
authors.affiliation: School of Stomatology, Beijing Medical University, Beijing 100081.
authors.forename: X
authors.initials: X
authors.lastname: Zhang
authors.forename: Z
authors.initials: Z
authors.lastname: Zhang
authors.forename: X
authors.initials: X
authors.lastname: Zhang
mesh_terms: D002508:Cephalometry / Q000379:methods*; D006801:Humans; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000379:methods*; D011861:Radiography, Dental / Q000379:methods; D015203:Reproducibility of Results