A bridging method between 2D and 3D cephalometry using computed tomography synthesized cephalograms

Jing Jing Fang, Jia Kuang Liu, Chia Wei Chang, Yu Cheng Lin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Traditional cephalograms are X-ray films, which provide either frontal or lateral overlapped perspective medical imaging. Although computed tomography imaging provides more information in 3-dimensional anatomy, the landmarks for cephalometry are located in space which does not carry normal standards in 3-D cephalometry. The CT natural imaging method is different from X-ray in that they respectively use orthogonal and perspective projections. Thus, we cannot apply the statistical normal values gathered from traditional 2D cephometry to 3D cephalometry. This study makes use of calibrated synthesized cephalograms from computed tomography to construct a cephalometry bridge between 2-D and 3-D. In this thesis, we first review the imaging model of a specific X-ray machine (Asahi OrthoStage AUTO IIIN) by a camera calibration method. We then construct a reference system for a virtual head, and synthesize calibrated X-ray cephalograms using the volume rendering algorithm. System accuracy for the synthesis X-ray cephalograms is verified through an interactive corresponding landmark system between 2-D and 3-D. An experimental clinician was invited to manually place 17 landmarks on the X-rays and their corresponding, shuffled in random order. The systematic error, average error, and standard deviation of landmark positions are 0.15 mm, 0.97 mm, and 0.45 mm, respectively. The interactive system bridges the transformation from orthogonal 3-D to perspective 2-D cephalometry.

Original languageEnglish
Title of host publicationInnovation for Applied Science and Technology
Pages1589-1595
Number of pages7
DOIs
Publication statusPublished - 2013 Feb 20
Event2nd International Conference on Engineering and Technology Innovation 2012, ICETI 2012 - Kaohsiung, Taiwan
Duration: 2012 Nov 22012 Nov 6

Publication series

NameApplied Mechanics and Materials
Volume284-287
ISSN (Print)1660-9336
ISSN (Electronic)1662-7482

Other

Other2nd International Conference on Engineering and Technology Innovation 2012, ICETI 2012
CountryTaiwan
CityKaohsiung
Period12-11-0212-11-06

Fingerprint

Tomography
X rays
Imaging techniques
X ray films
Volume rendering
Systematic errors
Medical imaging
Cameras
Calibration

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Fang, J. J., Liu, J. K., Chang, C. W., & Lin, Y. C. (2013). A bridging method between 2D and 3D cephalometry using computed tomography synthesized cephalograms. In Innovation for Applied Science and Technology (pp. 1589-1595). (Applied Mechanics and Materials; Vol. 284-287). https://doi.org/10.4028/www.scientific.net/AMM.284-287.1589
Fang, Jing Jing ; Liu, Jia Kuang ; Chang, Chia Wei ; Lin, Yu Cheng. / A bridging method between 2D and 3D cephalometry using computed tomography synthesized cephalograms. Innovation for Applied Science and Technology. 2013. pp. 1589-1595 (Applied Mechanics and Materials).
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Fang, JJ, Liu, JK, Chang, CW & Lin, YC 2013, A bridging method between 2D and 3D cephalometry using computed tomography synthesized cephalograms. in Innovation for Applied Science and Technology. Applied Mechanics and Materials, vol. 284-287, pp. 1589-1595, 2nd International Conference on Engineering and Technology Innovation 2012, ICETI 2012, Kaohsiung, Taiwan, 12-11-02. https://doi.org/10.4028/www.scientific.net/AMM.284-287.1589

A bridging method between 2D and 3D cephalometry using computed tomography synthesized cephalograms. / Fang, Jing Jing; Liu, Jia Kuang; Chang, Chia Wei; Lin, Yu Cheng.

Innovation for Applied Science and Technology. 2013. p. 1589-1595 (Applied Mechanics and Materials; Vol. 284-287).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Fang JJ, Liu JK, Chang CW, Lin YC. A bridging method between 2D and 3D cephalometry using computed tomography synthesized cephalograms. In Innovation for Applied Science and Technology. 2013. p. 1589-1595. (Applied Mechanics and Materials). https://doi.org/10.4028/www.scientific.net/AMM.284-287.1589