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Development of Light-X ray Hybrid CT System for Plasma Diagnosis

等离子体诊断光X射线混合CT系统的研制

基本信息

批准号：
03555087
负责人：
NAKAJIMA Masato
金额：
$ 2.24万
依托单位：
Keio 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

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03555087/
关键词：
Plasma Diagnosis Computerized Tomography Discharge Tube X ray CT Image Reconstruction Tomography

项目摘要

In 1991, the basic experiment was performed for deciding the specifications of the developed system. In the basic experiment, the quantitative accuracy and the spatial resolution of the reconstructed image obtained by the light emission CT technique are investigated.In 1992, the light - X ray hybrid CT system was designed according to the basic experiment performed in 1991, and then the part of the light emission CT was produced. In this part, the mirror is rotated at high speed in front of the collimator, and both the mirror and the collimator are rotated around the object discharge tube, so that the projection data required for reconstructing the distribution can be collected in several seconds. Next, the light emission CT system was combined with a X ray CT system provided by one of the investigators, Mr. Yuge, and then the hybrid system was constructed. In the hybrid system, the data measuring condition of the light emission CT system agrees with that of the X ray CT system, so that the compatibility of the data between both systems is important factor for the hybrid system.Using the developed hybrid system, both the projection data of the luminous intensity's distribution in the discharge tube and the shape of the glass tube were measured. Then influence of the light refraction at the boundary of the grass of the tube was corrected using the shape of the glass obtained by the developed system. Consequently, the quantitative accuracy of the reconstructed image of the luminous intensity's distribution was improved.

1991年，为确定所研制系统的技术指标进行了基础实验。在基础实验中，研究了光发射CT技术重建图像的定量精度和空间分辨率。1992年，在1991年进行的基础实验的基础上，设计了光-X射线混合CT系统，并制作了部分光发射CT。在这一部分中，反射镜在准直器前面高速旋转，反射镜和准直器都绕着物体放电管旋转，这样就可以在几秒钟内收集重建分布所需的投影数据。接下来，将发光CT系统与研究人员之一Yuge先生提供的X射线CT系统相结合，然后构建混合系统。在混合系统中，光发射CT系统的数据测量条件与X射线CT系统的数据测量条件一致，因此两者之间的数据兼容性是混合系统的重要因素。然后利用所研制的系统得到的玻璃形状，对管子边缘的光折射影响进行了修正。从而提高了光强分布重建图像的定量精度。