The Development of analyzing method of 3T-MR Image of the temporomandibular joint using DICOM Viewer

本研究的目的是建立一种能更准确地分析颞下颌关节（TMJ）关节病患者软、硬组织形态和功能异常的方法。5T MR采用新型双表面线圈，3.材料与方法）在德岛大学医院伦理委员会的许可下，对9名无症状和有症状的志愿者进行了3T MR双表面线圈检查。颞下颌关节的OT MR成像：采用3英寸双表面线圈和升级的成像软件优化成像方法（例如，2.颞下颌关节形态和功能异常分析方法的建立：探讨颞下颌关节三维形态和动态运动的简易成像和分析方法。新的3英寸双表面线圈3。颞下颌关节的OT MR成像 ...更多信息 垂直于髁状突头长轴方向的断层成像适合于颞下颌关节软组织形态学改变的成像。为了分析颞下颌关节的动态运动，可采用与矢状面平行的断面进行颞下颌关节成像。2. 1）形态学分析：采用多平面重建（MPR）和多种可视化软件进行TMJ形态学分析。可以获得更清晰的图像。测量变得更加容易和正确。2)功能分析：下颌骨开闭运动过程中髁突和关节盘的3D伪电影成像成为可能。采用简单阈值法的半自动图像分析不能区分颞下颌关节的分区。徒手追踪这些隔间浪费了大量的时间，并且在图像层的对齐上缺乏准确性。利用样条曲线连接零件轮廓上的点，采用半自动的边缘检测方法。该方法缩短了分析时间，提高了分析精度。为了临床应用，需要结合3.0T磁共振图像的特点，采用合适的计算机辅助诊断（CAD）图像处理技术，对颞下颌关节的动态运动进行诊断分析。少

Purpose) The purpose of this investigation is to develop a method to analyze the morphological and functional abnormality of the soft and hard tissue of the patients with temporomandibular joint (TMJ) arthrosis more correctly than 1. 5T MR ultilizing a new dual surface coil for 3. OT MR.Materials and Methods) Nine asymptomatic and symptomatic volunteers were examined by 3T MR with dual surface coil under the permission of the ethics committee of Tokushima University Hospital.1.New 3-inch Dual Surface Coil for 3. OT MR imaging of TMJ: Using 3-inch Dual Surface Coil and upgraded imaging software optimized imaging method (ex. imaging sequences, positioning of imaging layers ) to obtain clear image of TMJ were investigated.2.Development of a method to analyze morphological and functional abnormality of TMJ: Simple imaging and analyzing methods of morphology and dynamic movement of TMJ three-dimensionally were investigated.Results) 1. New 3-inch Dual Surface Coil for 3. OT MR imaging of TMJ … More : Imaging of TMJ by sections perpendicular to the long axis of condylar head was suitable for the imaging of morphological changes of soft tissue of TMJ. For the purpose of analyzing dynamic movement of TMJ imaging of TMJ by sections parallel to sagittal plane was possible. 2. Development of a method to analyze morphological and functional abnormality of TMJ: 1)Morphological analysis: Morphological analyze of TMJ by MPR (multiplaner reconstruction) and 3D imaging by many kinds of viewing software could be performed. More clear image could be obtained. Measurement became more easy and correct. 2)Functional analysis: 3D Pseudo-Cinematographic imaging of anticular condyle and disc during open-close mandubular movement became possible. Semi-automatic image analysis using simple threshold method could not separate compartments of TMJ. Free-handed tracing of these compartments wastes huge times and lacked accuracy on alignment of image layers. We used semi-automatic edge detecting method connecting points on the contour of the components by spline curve. This method minimized analyzing time and improved accuracy. For the application to the clinics an analyzing method which can diagnose the dynamic movement of TMJ is necessary utilizing suitable computer-aided diagnostic (CAD) image processing considering characteristics of 3.0T MR image of TMJ. Less