面部三维标志点测量误差的欧几里德距离矩阵分析  

Analysis on the measurement error of three-dimensional facial landmarks based on the euclidean distance matrix analysis

作　　者：张光霞[1] 任甫[1] 

机构地区：[1]辽宁医学院人类学研究所,锦州121000

出　　处：《解剖学杂志》2013年第1期109-112,130,共5页Chinese Journal of Anatomy

摘　　要：目的：运用ETDIPS Version 2.0软件与核磁共振成像技术，对面部三维标志点坐标进行间接获取，并根据欧几里德距离矩阵分析（EDMA）思想对测量结果进行误差分析，评估此测量方法的测量效率。方法：取健康无五官疾病成人20例，获取其头颅核磁共振（MRI）图像，2位测量人员运用同一ETDIPS version 2.0软件从MRI图像中提取每个样本的面部13个解剖标志点三维坐标，间隔1周重复此测量过程1次。应用EDMA对核磁共振仪、ETDIPS软件以及测量人员（测量人员间以及测量人员内）的测量精度进行统计分析。结果：MRI、 ETDIPS及测量人员（测量人员间以及测量人员内）的测量误差最大变异量为0.022mm， Bootstrap 检验P值分别为0.220、 0.855、 0.959、 0.709、 0.699；鼻突点、左鼻翼点是对测量差异影响较大点，此外MRI测量在上唇中点、研究人员测量在右口角点和鼻额点的波动较大。结论：鼻突点、左鼻翼点对三维面部测量差异影响较大。本测量方法中涉及的仪器、软件及测量人员对三维面部的测量误差均在允许范围之内，可以应用于进一步的相关研究中。Objective： We focus on the development of indirect three-dimensional facial landmark location and the data collection error to introduce the three-dimensional coordinate measurement method based on ETDIPS version 2.0 software and magnetic resonance imaging （MRI） technique. Methods： MRI of 20 young healthy subjects in Liaoning province was performed twice at one hour intervak The 3-dimeasional coordinates of 13 anatomical craniofacial landmarks were measured directly using ETDIPS version 2.0 software by two observers. After a week interval, a second time measurement was done by the same software and the same observers. The data collection precision of MR scaner, ETDIPS software and observers （the intra-ob- server error and inter-observer error） were assessed by Euclidean Distance Matrix Analysis （EDMA） . Results： The maxi- mum distance value of the measurement errors was 0. 022 mm. The P values of MR scaner, ETDIPS software and observers （the intra-observer error and inter-observer error） data collection error were 0. 220, 0. 855, 0. 959, 0. 709 and 0. 699 （a= 0.05） respectively; The influence landmarks were pronasale, left alar, sellion, labrale superius and right cheilion. Conclu- sion： The pronasale and left alar have more influence on three-dimensional facial measurement. The measurement errors are acceptable, the data and the method can be used for future studies.

关 键 词：三维 解剖标志点 测量误差 人体测量学 

分 类 号：R778.2[医药卫生—眼科]