面部软组织三维测量系统的可靠性研究

Validation of the 3D Measuring System

目的 检验面部软组织三维测量系统的技术可靠性。方法 以石膏头像为研究对象 ,用系统在 15种不同条件下测量模型面部 9个点至鼻根点的距离 ,以用游标卡尺得到的测量结果为评判标准与前者比较。结果 两者的平均差值为 1.2 1mm ,误差率为 2 .0 9%。模拟头位变化的 8种状态中 ,仅在右转 10°时与标准相比有显著性差异。

Objective To test the validation of the 3D measuring technique. Methods A life size plaster cast of human head was used as the anthropomorphic model. Fifteen experimental conditions were studied. Nine linear distances between landmarks and Nasion were measured each time. These were compared to the standard anthropometric measurements using the same landmarks.Results The mean difference was 1.21mm(2.09%). Among the 8 conditions imitating different head posture, only the one turning 10 degrees to the left had a significant difference from the normal position.Conclusion In accordance with the requirements of “ human measurement handbook”, the system error is acceptable. [