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 language | English |
|---|---|
| Title of host publication | Innovation for Applied Science and Technology |
| Pages | 1589-1595 |
| Number of pages | 7 |
| DOIs | |
| Publication status | Published - 2013 Feb 20 |
| Event | 2nd International Conference on Engineering and Technology Innovation 2012, ICETI 2012 - Kaohsiung, Taiwan Duration: 2012 Nov 2 → 2012 Nov 6 |
Publication series
| Name | Applied Mechanics and Materials |
|---|---|
| Volume | 284-287 |
| ISSN (Print) | 1660-9336 |
| ISSN (Electronic) | 1662-7482 |
Other
| Other | 2nd International Conference on Engineering and Technology Innovation 2012, ICETI 2012 |
|---|---|
| Country | Taiwan |
| City | Kaohsiung |
| Period | 12-11-02 → 12-11-06 |
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All Science Journal Classification (ASJC) codes
- Engineering(all)
Cite this
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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 proceeding › Conference contribution
TY - GEN
T1 - A bridging method between 2D and 3D cephalometry using computed tomography synthesized cephalograms
AU - Fang, Jing Jing
AU - Liu, Jia Kuang
AU - Chang, Chia Wei
AU - Lin, Yu Cheng
PY - 2013/2/20
Y1 - 2013/2/20
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84873916162&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84873916162&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/AMM.284-287.1589
DO - 10.4028/www.scientific.net/AMM.284-287.1589
M3 - Conference contribution
AN - SCOPUS:84873916162
SN - 9783037856123
T3 - Applied Mechanics and Materials
SP - 1589
EP - 1595
BT - Innovation for Applied Science and Technology
ER -