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

目的：本研究的目的是开发一种方法来更准确地分析TMJ关节(TMJ)患者的软硬组织的形态和功能异常，使用新的双表面线圈用于3.OT MR。材料和方法)在德岛大学医院伦理委员会的许可下，使用双表面线圈对9名无症状和有症状的志愿者进行了3T MR检查。2.建立了一种分析颞下颌关节形态和功能异常的方法：对颞下颌关节形态和动态运动的简单成像和三维分析方法进行了研究。结果：1.新的3英寸双表面线圈用于…的OTMR成像结论：垂直于髁头长轴的TMJ成像适合于TMJ软组织形态改变的成像。为了分析TMJ的动态运动，可以对TMJ进行平行于矢状面的断层成像。2.建立了分析TMJ形态和功能异常的方法：1)形态分析：通过多平面重建(MPR)对TMJ进行形态分析，并利用多种观察软件进行三维成像。可获得更清晰的图像。测量变得更加容易和准确。2)功能分析：实现了下颌骨开合运动过程中抗球突和关节盘的三维伪影像成像。用简单阈值方法进行半自动图像分析不能分离出TMJ的各亚区。徒手跟踪这些隔间浪费了大量的时间，并且在图像层的对准上缺乏准确性。采用半自动边缘检测方法，通过样条曲线将零件轮廓上的点连接起来。这种方法最大限度地减少了分析时间，提高了准确度。为了将其应用于临床，需要一种分析方法来诊断TMJ的动态运动，考虑到TMJ 3.0T磁共振图像的特点，利用合适的计算机辅助诊断(CAD)图像处理。较少

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