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Imaging technological study of bone change

骨变化的影像技术研究

基本信息

批准号：
60570949
负责人：
KASHIMA Isamu
金额：
$ 1.09万
依托单位：
Kanagawa Dental College
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1985
资助国家：
日本
起止时间：
1985 至 1986
项目状态：
已结题

项目摘要

The bone structure consists basically of the periosteum, bone cortex and intramedullary cavity. The cancellous bone forming the intramedullary cavity is visualized as a linear or reticular pattern of bone trabeculae on the radiographic images. The bone tissue is a metabolic one that undergoes repeated resorption and formation. In paticular, the mineral content of the cancellous bone fluctuates in close response to changes in bone metabolism. Generally it has been said that bone loss and calcification of abonomalities can be detected by conventional Radiography when the bone demineralization or hypermineralization is more than 30 to 40 percent.Panoramic tomography, a procedure which is relatively standardized, was employed because it is simple to manipulate and allows evaluation of the entire mandible. Because of the blurred images specific to tomographs, conventional panoramic tomographs are not suitable for the visual analysis of patterns of the mandibular bone trabeculae. This problem was overcome by using a laser scan system, which visualized the trabeculae quite clearly and allowed relatively accurate classification of the patterns on the image produced.In addition, we were able to evaluate quantitatively and qualitatively the distribution of x-ray energy in relation to information on the bone trabeculae on the digitalized imaging plate using a physical procedure.

骨结构主要由骨膜、骨皮质和髓内腔组成。形成髓内腔的松质骨在X线片上显示为线状或网状的骨小梁图案。骨组织是一种新陈代谢的组织，经历了反复的吸收和形成。在特殊情况下，松质骨的矿物质含量随着骨代谢的变化而波动。一般认为，当骨质脱矿或过度矿化超过30%至40%时，常规X线片可以检测到异常的骨丢失和钙化。全景断层扫描是一种相对标准化的方法，因为它操作简单，可以对整个下颌骨进行评估。由于体层摄影术所特有的模糊图像，传统的全景体层摄影术不适合于对下颌骨小梁形态的视觉分析。这个问题被激光扫描系统克服了，它非常清楚地显示了骨小梁，并允许对产生的图像上的图案进行相对准确的分类。此外，我们能够使用物理程序来定量和定性地评估X射线能量相对于数字化成像板上的骨小梁的信息的分布。