Ma Lili, Xu Tianmin, Lin Jiuxiang
Department of Orthodontics, School and Hospital of Stomatology, Peking University, Beijing 10081, People's Republic of China.
Comput Methods Programs Biomed. 2009 Jun;94(3):290-8. doi: 10.1016/j.cmpb.2009.01.010. Epub 2009 Mar 20.
The aim of this study was to validate a newly developed three-dimensional (3D) structured light scanning system in recording the facial morphology. The validation was performed in three aspects including accuracy, precision and reliability. The accuracy and precision were investigated using a plaster model with 19 marked landmarks. The accuracy was determined by comparing the coordinates from the 3D images and from the coordinates measure machine (CMM). The precision was quantified through the repeated landmarks location on 3D images. The reliability was investigated in 10 adult volunteers. Each was scanned five times in 3 weeks. The 3D images acquired at different times were compared with each other to measure the reliability. We found that the accuracy was 0.93 mm, the precision was 0.79 mm, the reliability was 0.2mm. These findings suggested that the structured light scanning system was accurate, precise and reliable to record the facial morphology for both clinic and research purposes.
本研究的目的是验证一种新开发的三维（3D）结构光扫描系统在记录面部形态方面的性能。验证从准确性、精密度和可靠性三个方面进行。使用带有19个标记标志点的石膏模型研究准确性和精密度。通过比较3D图像中的坐标与坐标测量机（CMM）的坐标来确定准确性。通过在3D图像上重复定位标志点来量化精密度。在10名成年志愿者中研究可靠性。每位志愿者在3周内扫描5次。比较不同时间获取的3D图像以测量可靠性。我们发现准确性为0.93毫米，精密度为0.79毫米，可靠性为0.2毫米。这些结果表明，该结构光扫描系统在记录面部形态方面准确、精密且可靠，可用于临床和研究目的。
