Repeatability of three-dimensional measurements based on cone-beam CT images

VernacularTitle:锥形束CT三维头影测量项目可重复性初探
Author: Shu-Ran LIANG ¹ ; Wei-Min GAO ; Yu-Xing BAI ; Wei-Jiao YIN ; Nan ZHANG
Author Information

1. 100050,首都医科大学口腔医学院正畸科
Keywords: Cone-beam computed tomography; Anthropometry; Reproducibility of results
From: Chinese Journal of Stomatology 2013;48(4):248-252
CountryChina
Language:Chinese
Abstract: Objective To investigate the repeatability of three-dimensional (3-D) cephalometric measurements for the clinical application of 3-D cephalometry.Methods Forty-nine measurements that widely used in traditional cephalometric analyses were defined in 3-D cone-beam CT(CBCT) images.Three examiners identified landmarks on CBCT images of 17 subjects with normal occlusion,respectively,and 3-Dmeasurements were exported automatically by software SimPlant.Inter-examiner reliability correlation coefficients(ICC) were obtained for all measurements.Results Repeatability of 36 measurements was high (ICC value greater than 0.9),including SNA,SNB.Repeatability of 11 measurements was moderate (ICC value between 0.8 and 0.9),including CoL-GoL,CoL-MSP.Repeatability of 2 measurements was low (ICC value lower than 0.8),including Gn-MSP and MPR-MSP.Conclusions Most 3-D cephalometric measurements based on CBCT had high repeatability.However,some 3-D cephalometric measurements had limited repeatability.