Evaluation of 3-D Image Accuracy of Human Temporomandibular Joint Image that was Reconstructed from Spiral CT Data

根据螺旋 CT 数据重建的人体颞下颌关节图像的 3D 图像精度评估

基本信息

批准号：
13672038
负责人：
HOSOKI Maki
金额：
$ 2.11万
依托单位：
The University OF Tokushima
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2002
项目状态：
已结题

项目摘要

Three-dimensional image of temporomandibular joint that was reconstructed from spiral CT data may have much diagnostic information. Several researches reported about the combination of 3-D TMJ image and six-degrees-of-freedom jaw movement data for the evaluation of jaw function. Very few studies have reported about accuracy of these 3-D images. The purpose of this research is to investigate the optimal scanning condition of spiral CT image and the distortion of reconstructed 3-D images3-D TMJ image of dry human skull was taken with spiral CT (Somatom Plus 4, Siemens Co). Same material was also scanned with 3-D digitizer (Microcode FN503, Mitsutoyo Co) to evaluate actual size of the imaging sample. Comparison of these two images was done with computer graphics. With the finest scanning condition, maximum error of the CT image was less than 2% and this accuracy was sufficient enough to evaluate slight inter joint space of TMJDistortion of CT image was mostly affected by table feed speed. Cut level CT number was very influential for size of CT image. When cortex bone CT number was applied as the cut level, size of the 3-D TMD image became 10 % smaller than that of actual TMJIt would be concluded that the standardization of scanning condition should be concerned for the evaluation of 3-D TMD image using CT dataPart of this research was presented at the 81 st General Session and Exhibition of the International Association for Dental Research, Goteborg, Sweden, June 25-28, 2003

根据螺旋CT数据重建的颞下颌关节三维图像可能包含很多诊断信息。一些研究报告了结合 3D TMJ 图像和六自由度下颌运动数据来评估下颌功能。很少有研究报告这些 3D 图像的准确性。本研究的目的是研究螺旋CT图像的最佳扫描条件和重建3D图像的失真。使用螺旋CT（Somatom Plus 4，西门子公司）拍摄干燥人头骨的3D TMJ图像。还使用 3D 数字化仪（Microcode FN503，Mitsutoyo Co）扫描相同的材料，以评估成像样本的实际尺寸。使用计算机图形对这两个图像进行比较。在最精细的扫描条件下，CT图像的最大误差小于2%，这个精度足以评估TMJ的微小关节间隙。CT图像的畸变主要受工作台进给速度的影响。切级CT数对CT图像的大小影响很大。当皮质骨CT数作为切割水平时，3-D TMD图像的尺寸变得比实际TMJI小10％，因此可以得出结论，3-D TMD图像的评估应关注扫描条件的标准化使用 CT 数据本研究的一部分已在 2003 年 6 月 25 日至 28 日于瑞典哥德堡举行的国际牙科研究协会第 81 届全体会议和展览会上发表