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Development of the cephalometrically videofluorographic system for the temporomandibular joint ; biplane lateral oblique transcranial projection.

颞下颌关节头影测量荧光摄影系统的开发；

基本信息

批准号：
03557087
负责人：
FUJISHITA Masami
金额：
$ 8.26万
依托单位：
Osaka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B)
财政年份：
1991
资助国家：
日本
起止时间：
1991 至 1992
项目状态：
已结题

项目摘要

A diagnostic imaging system for the temporomandibular joint (TMJ) function was developed that was suitable for the routine clinical use. The system was designed for the subject to maintain the physiologic position with qualified image. The most preferred focus-image distance was 900mm with the 4-inch aperture imaging system employed here. In this circumstance, the fluorographic view of the TMJ was obtained within 80kVp and 2mA. Therefore, fixed anode X-ray tubes and single-phase rectifiers could be employed, and we could achieve the silent circumstance with a small scale. The scattered rays which interfere the quality of the image, originating from the opposite side of the x-ray tube, could be eliminated by the fixed collimator of the three different size.Fluorography was recorded into a videotape. Two video signals of the left and right TMJ fluorography were integrated with the use of digital processing unit and displayed in a single monitor. The operator could select either a view of the bilateral joints simultaneously or a enlarged view of the unilateral joint.This system was applied to the 30 subjects including volunteers and patients with cranimandibular disorders. We could obtain a image of the joint movement with enough contrast clinically. Furthermore, the typical movement patterns of the mandibular condyle were observed in the case with clicking noise or limitation of opening mouth.The simultaneous recording and analysis of the joint movement and the joint sound is in progress with this system and digital sound recording system.

研制了一套适合于临床常规使用的颞下颌关节功能影像诊断系统。该系统旨在使受试者保持生理位置，并获得合格的图像。最优选的焦像距离为900 mm，此处采用4英寸孔径成像系统。在80kVp和2mA的电压下，获得TMJ的X线图像。因此，我们可以采用固定阳极X射线管和单相整流器，并可以实现小规模的静音环境。用三种不同尺寸的固定准直器消除来自X线管另一侧的干扰图像质量的散射射线。利用数字处理单元将左右两侧TMJ X线透视图像信号进行整合，并在同一台显示器上显示。该系统可同时显示双侧关节面和单侧关节面，并应用于30例正常志愿者和颅下颌关节紊乱病患者。在临床上，我们可以获得足够对比度的关节运动图像。此外，还观察到了有咔哒声或张口受限时髁状突的典型运动模式，并利用该系统和数字录音系统对关节运动和关节音进行了同步记录和分析。