Accuracy and repeatability of cone-beam computed tomography (CBCT) measurements used in the determination of facial indices in the laboratory setup
Accuracy and repeatability of cone-beam computed tomography (CBCT) measurements used in the determination of facial indices in the laboratory setup
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DOI：
10.1016/j.jcms.2008.07.006
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发表时间：
2009-01-01
影响因子：
3.1
通讯作者：
Mommaerts, Maurice Y.
中科院分区：
文献类型：
--
作者：
Moerenhout, Bernard A. M. M. L.;Gelaude, Frederik;Mommaerts, Maurice Y.
目的：为了评估从锥形束计算机断层扫描（CBCT）扫描获得的体模面部的三维（313）表面精度，并确定使用Maxilim（R）软件（Medicim N. V.，Mechelen，Belgium）.材料和方法：用CBCT（I-CAT（TM），Imaging Sciences International，Inc.，Hatfield，USA）。数据用于产生3D表面网格（Maxilim（R）和Mimics（R），Materialise N. V.，Leuven，Belgium），与使用Focus Inspection软件（Metris N. V.，比利时鲁汶）。通过计算Pearson相关系数和组内相关性（ICC）确定Maxilim（R）3D头影测量法测量面部标志点之间距离的观察者内和观察者间可靠性。Dahlberg公式用于评估方法误差（ME）。结果：（1）Maxilim（R）和Mimics（R）分割的三维网格最大偏差范围分别为1.9 mm和1.8 mm。(2)测试-再测试和观察者间信度较高; Pearson相关系数为1.000，ICC为0.9998。垂直测量的ME略大于宽度测量的ME。最大ME为1.33 mm。结论：使用Maxilim（R）和Mimics（R）软件分割的CBCT扫描的3D表面精度较高。Maxilim（R）还显示出令人满意的内部和评估员之间的可靠性，用于测量刚性面部表面上的距离。(C)2008年欧洲颅颌面外科协会
Aim: To assess the three dimensional (313) surface accuracy of a phantom's face acquired from a cone-beam computed tomography (CBCT) scan and to determine the reliability of selected cephalometric measurements performed with Maxilim (R) software (Medicim N.V., Mechelen, Belgium). Material and methods: A mannequin head was imaged with a CBCT (I-CAT (TM), Imaging Sciences International, Inc., Hatfield, USA). The data were used to produce 3D surface meshes (Maxilim (R) and Mimics (R), Materialise N.V., Leuven, Belgium) which were compared with an optical surface scan of the head using Focus Inspection (R) software (Metris N.V., Leuven, Belgium). The intra- and inter-observer reliability for the measurement of distances between facial landmarks with Maxilim (R) 3D cephalometry were determined by calculating Pearson correlation coefficients and intraclass correlation (ICC). The Dahlberg formula was used to assess the method error (ME). Results: (1) The maximal range of the 3D mesh deviations was 1.9 rum for Maxilim (R), and 1.8 mm for Mimics (R) segmentation. (2) Test-re-test and inter-observer reliability were high; Pearson's correlation coefficient was 1.000 and the ICC was 0.9998. The ME of the vertical measurements was a little larger than that calculated for the width measurements. Maximum ME was 1.33 mm. Conclusions: The 3D surface accuracy of CBCT scans segmented with Maxilim (R) and Mimics (R) software is high. Maxilim (R) also shows satisfactory intra- and inter-assessor reliability for measurement of distances on a rigid facial surface. (C) 2008 European Association for Cranio-Maxillofacial Surgery