Abstract：
BACKGROUND: The reliability and repeatability of stereophotogrammetry and CT in 3-dimensional anthropometric facial analysis were investigated in this study, which also explored the clinical application of supine CT.
METHODS: In this study, 3D CT and 3dMD stereophotogrammetry were used on 20 healthy volunteers. The fitting distance between stereophotogrammetry and CT scans at landmark points was measured, along with facial feature measurements (Al-Al) face width (Go-Go, Zy-Zy, Ex-Ex), and hemi-face height (Sn-Gn). The intraclass correlation coefficient (ICC) was employed to assess interrater agreement and to verify the reliability of the measurement methods. Paired t -analysis was utilized for analyzing intramethod displacement.
RESULTS: The alare, nasion, and pronasale points were found to be minimally influenced by different positions and are more recommended as landmark points for registration. CT demonstrated good interrater reliability on all indicators. In stereophotogrammetry, measurements for Go-Go and Zy-Zy displayed an interclass correlation coefficient (ICC) of less than 0.75. Significant differences between the 2 methods were observed for En-En, Ex-Ex, and Go-Go ( P < 0.05). Specifically, CT analysis for Go-Go showed a measurement 2.34 mm larger than that obtained with the 3dMD method.
CONCLUSIONS: Both CT and stereophotogrammetry were found to be reliable methods for evaluating facial soft tissue. It is speculated that Go-Go measurement is primarily influenced by factors such as different positions, facial expressions, and gravity. These variables should be carefully considered during the evaluation of the mandibular angle region.
METHODS: In this study, 3D CT and 3dMD stereophotogrammetry were used on 20 healthy volunteers. The fitting distance between stereophotogrammetry and CT scans at landmark points was measured, along with facial feature measurements (Al-Al) face width (Go-Go, Zy-Zy, Ex-Ex), and hemi-face height (Sn-Gn). The intraclass correlation coefficient (ICC) was employed to assess interrater agreement and to verify the reliability of the measurement methods. Paired t -analysis was utilized for analyzing intramethod displacement.
RESULTS: The alare, nasion, and pronasale points were found to be minimally influenced by different positions and are more recommended as landmark points for registration. CT demonstrated good interrater reliability on all indicators. In stereophotogrammetry, measurements for Go-Go and Zy-Zy displayed an interclass correlation coefficient (ICC) of less than 0.75. Significant differences between the 2 methods were observed for En-En, Ex-Ex, and Go-Go ( P < 0.05). Specifically, CT analysis for Go-Go showed a measurement 2.34 mm larger than that obtained with the 3dMD method.
CONCLUSIONS: Both CT and stereophotogrammetry were found to be reliable methods for evaluating facial soft tissue. It is speculated that Go-Go measurement is primarily influenced by factors such as different positions, facial expressions, and gravity. These variables should be carefully considered during the evaluation of the mandibular angle region.
摘要：
背景：本研究调查了立体摄影测量和CT在三维人体测量面部分析中的可靠性和可重复性，并探讨了仰卧位CT的临床应用。
方法：在本研究中，对20名健康志愿者进行了3DCT和3dMD立体摄影测量。测量了标志点的立体摄影测量与CT扫描的拟合距离,随着面部特征测量(Al-Al)面部宽度(Go-Go，Zy-Zy,Ex-Ex),和半面高度(Sn-Gn)。采用组内相关系数（ICC）来评估评估者之间的一致性并验证测量方法的可靠性。配对t分析用于分析模内位移。
结果：alare，海军,和前凸点被发现受不同位置的影响最小，更建议作为注册的标志点。CT在所有指标上都表现出良好的评分者间可靠性。在立体摄影测量中，Go-Go和Zy-Zy的测量显示类间相关系数(ICC)小于0.75。对于En-En，观察到两种方法之间的显着差异，Ex-Ex,Go-Go(P<0.05)。具体来说,Go-Go的CT分析表明，测量值比3dMD方法大2.34mm。
结论：发现CT和立体摄影测量是评估面部软组织的可靠方法。据推测，Go-Go测量主要受不同位置、面部表情,和重力。在评估下颌角区域时应仔细考虑这些变量。
方法：在本研究中，对20名健康志愿者进行了3DCT和3dMD立体摄影测量。测量了标志点的立体摄影测量与CT扫描的拟合距离,随着面部特征测量(Al-Al)面部宽度(Go-Go，Zy-Zy,Ex-Ex),和半面高度(Sn-Gn)。采用组内相关系数（ICC）来评估评估者之间的一致性并验证测量方法的可靠性。配对t分析用于分析模内位移。
结果：alare，海军,和前凸点被发现受不同位置的影响最小，更建议作为注册的标志点。CT在所有指标上都表现出良好的评分者间可靠性。在立体摄影测量中，Go-Go和Zy-Zy的测量显示类间相关系数(ICC)小于0.75。对于En-En，观察到两种方法之间的显着差异，Ex-Ex,Go-Go(P<0.05)。具体来说,Go-Go的CT分析表明，测量值比3dMD方法大2.34mm。
结论：发现CT和立体摄影测量是评估面部软组织的可靠方法。据推测，Go-Go测量主要受不同位置、面部表情,和重力。在评估下颌角区域时应仔细考虑这些变量。
