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

目的)本研究的目的是建立一种更准确地分析颞下颌关节（TMJ）患者软硬组织形态和功能异常的方法。5T磁阻利用新的双曲面线圈3。材料与方法)经德岛大学医院伦理委员会许可，对9名无症状和有症状的志愿者进行双曲面线圈3T磁共振检查。新的3英寸双表面线圈3。TMJ的OT MR成像：探讨利用3英寸双表面线圈和升级成像软件优化成像方法（如成像序列、成像层定位）获得清晰的TMJ图像。TMJ形态学和功能异常分析方法的发展：研究了TMJ形态学和动态运动的简单三维成像和分析方法。结果)1。新的3英寸双表面线圈3。TMJ的OT MR成像更多：垂直于髁突头长轴的切片对TMJ的成像适合于对TMJ软组织形态变化的成像。为了分析TMJ的动态运动，可以平行于矢状面对TMJ进行成像。2. TMJ形态与功能异常分析方法的发展：1)形态学分析：利用MPR （multiplaner reconstruction）和多种三维成像软件对TMJ进行形态学分析。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：在开合下颌运动过程中，可以对髁突和椎间盘进行三维伪电影成像。采用简单的阈值法进行半自动图像分析，无法分离出TMJ的区室。徒手跟踪这些隔室浪费了大量的时间，并且在图像层的对齐上缺乏准确性。采用半自动边缘检测方法，通过样条曲线连接部件轮廓上的点。该方法减少了分析时间，提高了分析精度。为了临床应用，需要结合3.0T TMJ MR图像的特点，利用合适的计算机辅助诊断（CAD）图像处理，找到一种能够诊断TMJ动态运动的分析方法。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