快速成像与反演方法相结合的图像重建方法研究

项目名称： 快速成像与反演方法相结合的图像重建方法研究

项目编号： No.11304295

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 数理科学和化学

项目作者： 刘进

作者单位： 中国工程物理研究院流体物理研究所

项目金额： 22万元

中文摘要： 高能闪光照相是流体动力学实验的主要诊断技术。从单幅闪光照相图像重建出照相客体是诊断的首要任务。高能闪光照相中散射X射线、能谱效应、模糊和噪声等物理因素制约了图像品质，使得从图像重建出高精度的结果面临很多难题。尽管实验上采取了一系列措施来降低这些因素对图像品质的影响，但仍然未能达到高精度实验要求；传统图像处理方法对物理因素影响考虑不足，还未形成详细的能够考虑各种物理因素的图像处理模型。本项以闪光照相物理过程为基础，研制基于径迹法的快速成像程序；提出含多种物理因素的图像重建模型；将快速正向成像和反演方法相结合，形成能够考虑各种物理因素的图像重建方法；通过处理各种物理因素的影响来改善重建结果。本项目提出的正向成像与反演方法相结合的闪光照相图像重建技术不仅用于高能闪光照相，还可用于无损检测、医学CT等领域，同时对于质子照相、中子照相以及其它粒子辐射成像也有十分重要的借鉴作用。

中文关键词： 闪光照相；物理因素；密度重建；径迹法；

英文摘要： The high-energy x-ray radiography is the main method to dignose the hydrotest. The primary task of the radiography is to reconstruct the object from one image. In the radiography the scattered photons, spectrum effect, system blur and noise degrade the image quality and cause it very difficult to reconstruct the object in precision. Although many measures have been used to decrease the bad effect of the above factors, the requirement of precise experiment is not reached. The traditional methods of image reconstrcutions do not pay much attention on the factors and can not remove the effects of the factors. In order to improve the reconstruction result, many works will be carried out. Based on the processes of the radiography, the fast radiographic computer program on trace technology will be made, the complex physical model will be introduced, the image reconstructing method considering all kinds of physical factors will form after combining the fast radiographic simulation and the reconstruction method for inversed problem, the improved density reconstruction will be gained by dealing effectively with physical fators. The technology of image reconstruction not only fit for the radiography, but also is suitable for nondestructive detecting and medical CT. And the technology has referrence value for proton radiogr

英文关键词： high-energy x-ray radiography；physical factors；density reconstruction；x-ray trace method；