Automated Cephalometry: System Performance Reliability Using Landmark-Dependent Criteria
Automated Cephalometry: System Performance Reliability Using Landmark-Dependent Criteria
复制标题
DOI：
10.2319/092908-508r.1
复制
发表时间：
2009-11-01
影响因子：
3.4
通讯作者：
Takada, Kenji
中科院分区：
文献类型：
--
作者：
Tanikawa, Chihiro;Yagi, Masakazu;Takada, Kenji
目的：本研究的目的是评估一个系统的可靠性，该系统使用每个地标特有的地标相关标准，自动识别侧位头影照片上的解剖标志和相邻结构。材料和方法：为了评估系统的可靠性，该系统用于检查 65 个侧位头影照片。使用 alpha = 0.01 的置信椭圆将每个系统识别的围绕标志的解剖结构的面积以及每个系统识别的标志的位置与规范进行比较，这些椭圆源自根据 Baumrind 和 Frantz 报告的方法获得的 100 个估计值的散点图。当系统识别的区域与正常区域重叠时，则认为解剖结构识别成功。此外，当系统识别的点位于标准区域内时，则认为地标识别成功。根据这些判断标准，计算所有标志的成功率。结果：系统成功识别了所有图像中的所有指定解剖结构，并确定了标志的位置，平均成功率为88％（范围，77％-100％）。结论：结合置信椭圆提供的合理评估标准，证实所提出的系统是可靠的。 （角度正交。2009；79：1037-1046。）
Objective: The purpose of the present study was to evaluate reliability of a system that performs automatic recognition of anatomic landmarks and adjacent structures on lateral cephalograms using land mark-dependent criteria unique to each landmark.Materials and Methods: To evaluate the reliability of the system, the system was used to examine 65 lateral cephalograms. The area of each system-identified anatomic structure surrounding the landmark and the position of each system-identified landmark were compared with norms using confidence ellipses with alpha = .01, which were derived from the scattergrams of 100 estimates obtained according to the method reported by Baumrind and Frantz. When the system-identified area overlapped with the norm area, anatomic structure recognition was considered successful. In addition, when the system-identified point was located within the norm area, landmark identification was considered successful. Based on these judgment criteria, success rates were calculated for all landmarks.Results: The system successfully identified all specified anatomic structures in all the images and determined the positions of the landmarks with a mean success rate of 88% (range, 77%-100%).Conclusion: With the incorporation of the rational assessment criteria provided by confidence ellipses, the proposed system was confirmed to be reliable. (Angle Orthod. 2009;79:1037-1046.)