口腔医学研究

口腔医学研究 ›› 2015, Vol. 31 ›› Issue (7): 715-718.

• 临床研究论著 • 上一篇    下一篇

评估CBCT三维标志点识别的信度研究

史建陆*,郑鹭艳,杨智惠,金鑫   

  1. 福建医科大学教学医院·厦门市口腔医院正畸科 福建 厦门 361003
  • 收稿日期:2015-01-04 出版日期:2015-07-28 发布日期:2015-07-28
  • 通讯作者: 史建陆,电话:0592—2669553
  • 作者简介:史建陆(1967~ ),男,湖北人,硕士,主任医师,主要从事口腔三维诊断、正畸支抗的临床研究。

Reliability of CBCT-based 3D Landmarks Identification

SHI Jian-lu, ZHENG Lu-yan, YANG Zhi-hui, et al   

  1. Department of Orthodontics, Xiamen Stomatological Hospital. Xiamen 361003
  • Received:2015-01-04 Online:2015-07-28 Published:2015-07-28

PDF (PC)

282

被引次数

10

摘要： 目的:评估CBCT头颅标志点识别的信度,为将来三维头影测量分析提供参照。方法:对30例正畸患者的CBCT原始数据,5位观察者使用Dolphin 11.5软件对CBCT图像用多平面重建法标定(轴向、矢状向、冠状向联合定点)14个头颅标志点。一位主要观察者重复定点5次,其余4位观察者各3次,每次时间间隔1周。计算每个标志点的每个维度坐标值的ICC(组内相关系数)以评估观察者内部以及观察者之间的定点的信度。结果:对于观察者间ICC,有90.5%标志点识别的ICC大于0.75,64.3%大于0.9,仅有2.4%小于0.45。对于主要观察者内ICC,95.2%标志点识别的ICC大于0.75,88.1%大于0.9,没有标志点识别信度系数小于0.45。结论:结合适宜的标志点定义及良好的定点培训,使用Dolphin软件在CBCT图像上对新定义的标志点进行识别具有极好的信度。

关键词: CBCT, 标志点, 信度, 头影测量

Abstract: Objective: To evaluate the reliability of identification of CBCT-based skull landmarks and to provide reference for the three-dimensional cephalometric analysis in the future. Methods: 30 pretreatment CBCT data were randomly selected from the CBCT database. Dolphin 11.5 was used to identify 14 skull landmarks in the sagittal, coronal,and axial slices on 3D images by five observers. A principal observer repeated five times and the other four observers three times within a 1-week interval. Intra-class correlation coefficient (ICC) for the values of the coordinate x, y, z of each landmark was calculated to determine Intra-observer and inter-observer reliability. Results: The ICC was ＞0.90 for 64.3%,＞0.75 for 90.5% ,and≤0.45 for only 2.4% of inter-observer assessments. The ICC of the intra-observer assessments was ＞0.90 for 88.1%,＞0.75 for 95.2% ,and none of intra-observer ICC was ≤0.45. Conclusion: Using Dolphin software to identify landmarks on CBCT images can offer excellent reliability with appropriate landmark definition and well-trained observers.

Key words: Cone-beam computed tomography, Landmarks, Reliability, Cephalometry

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