Development of imaging selection criteria and procedures should precede cephalometric assessment with cone-beam computed tomography.

Cone-beam computed tomography (CBCT) systems for craniofacial imaging are now available from several manufacturers. CBCT potentially provides opportunities for 3-dimensional cephalometrics in orthodontic assessment of bony landmarks and air-bounded surfaces such as the facial skin. Two-dimensional cephalogram simulation could facilitate the transfer of growth projections from existing data sets as a starting point for use of a new 3-dimensional paradigm. Three methods are described to simulate conventional 2-dimensional cephalograms from CBCT images and volumetric data sets. However, certain precautions are required to assure that selection criteria and imaging parameters guarantee a radiation dose that is as low as reasonably achievable.

[1]  D. Hatcher,et al.  A three-dimensional evaluation of the upper airway in adolescents. , 2003, Orthodontics & craniofacial research.

[2]  S Baumrind,et al.  Using three-dimensional imaging to assess treatment outcomes in orthodontics: a progress report from the University of the Pacific. , 2003, Orthodontics & craniofacial research.

[3]  J Ghafari,et al.  Comparison of CT scanograms and cephalometric radiographs in craniofacial imaging. , 2002, Orthodontics & craniofacial research.

[4]  Demetrios J Halazonetis,et al.  At what resolution should I scan cephalometric radiographs? , 2004, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.

[5]  K Yamamoto,et al.  Development of dento-maxillofacial cone beam X-ray computed tomography system. , 2003, Orthodontics & craniofacial research.

[6]  E M Ongkosuwito,et al.  The reproducibility of cephalometric measurements: a comparison of analogue and digital methods. , 2002, European journal of orthodontics.

[7]  P. J. Sandler,et al.  Reproducibility of Cephalometric Measurements , 1988, British journal of orthodontics.

[8]  D. Hatcher,et al.  Current status and future needs in craniofacial imaging. , 2003, Orthodontics & craniofacial research.

[9]  K Maki,et al.  Computer-assisted simulations in orthodontic diagnosis and the application of a new cone beam X-ray computed tomography. , 2003, Orthodontics & craniofacial research.

[10]  Allan G Farman,et al.  Accuracy of linear temporomandibular joint measurements with cone beam computed tomography and digital cephalometric radiography. , 2005, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.

[11]  P Sukovic,et al.  Cone beam computed tomography in craniofacial imaging. , 2003, Orthodontics & craniofacial research.

[12]  C. Held,et al.  Cephalometric digitization: A determination of the minimum scanner settings necessary for precise landmark identification. , 2001, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.

[13]  Demetrios J Halazonetis,et al.  From 2-dimensional cephalograms to 3-dimensional computed tomography scans. , 2005, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.