The accuracy of matching three-dimensional photographs with skin surfaces derived from cone-beam computed tomography

被引:123
作者
Maal, T. J. J.
Plooij, J. M.
Rangel, F. A. [2 ]
Mollemans, W. [3 ,4 ]
Schutyser, F. A. C.
Berge, S. J. [1 ]
机构
[1] Radboud Univ Nijmegen, Med Ctr, Dept Oral & Maxillofacial Surg, Facial Imaging Res Grp 3D, NL-6500 HB Nijmegen, Netherlands
[2] Radboud Univ Nijmegen, Med Ctr, Dept Orthodont & Oral Biol, NL-6500 HB Nijmegen, Netherlands
[3] Univ Hosp Gasthuisberg Leuven, Med Image Comp Radiol Esat PSI, Fac Med, Louvain, Belgium
[4] Univ Hosp Gasthuisberg Leuven, Fac Engn, Louvain, Belgium
关键词
image fusion; 3D stereophotogrammetry; cone-beam CT; surface registration; maxillofacial surgery; 3D facial mode; orthodontics; computer-assisted three-dimensional imaging; accuracy;
D O I
10.1016/j.ijom.2008.04.012
中图分类号
R78 [口腔科学];
学科分类号
1003 [口腔医学];
摘要
The state-of-the-art diagnostic tools in oral and maxillofacial surgery preoperative orthodontic treatment are mainly two-dimensional, and consequently reveal limitations in describing the three-dimensional (3D) structures of a patient's face. New 3D imaging techniques, such as 3D stereophotogrammetry (3D photograph) and cone-beam computed tomography (CBCT), have been introduced. Image fusion, i.e. registration of a 3D photograph upon a CBCT, results in an accurate and photorealistic digital 3D data set of a patient's face. The purpose of this study was to determine the accuracy of three different matching procedures. For 15 individuals the textured skin surface (3D photograph) and untextured skin surface (CBCT) were matched by two observers using three different methods to determine the accuracy of registration. The registration error was computed as the difference (mm) between all points of both surfaces. The registration errors were relatively large at the lateral neck, mouth and around the eyes. After exclusion of artefact regions from the matching process, 90% of the error was within +/- 1.5 mm. The remaining error was probably caused by differences in head positioning, different facial expressions and artefacts during image acquisition. In conclusion, the 3D data set provides an accurate and photorealistic digital 3 D representation of a patient's face.
引用
收藏
页码:641 / 646
页数:6
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