基于清波反投影法的计算断层成像(CT)仿真

Simulation of Computed Tomography Based on Filtered Back－Projection

计算断层成像是一种先进的可视化技术．它利用物体材料与射线相互间的物理特性和计算机的运算能力，对通过物作横断面若干方向的投影数据，经过专门的算法反演得到物体横断面的物理特性，在生物医学工程、航空航天、石化工业、无损检测等领域具有非常广泛的应用价值．本文介绍了断层成像基本原理，重点就基于滤波反投影法的图像重建算法进行了讨论，并给出了采用该算法的计算机仿夏实验的结果，最后指出了进步研究的方面．

Computed Tomography(CT) is an advanced technique of visualization. It obtains cross-sectional physical characteristics of an object by implementing a set of projection data based on special algorithms, utilizing the physical features of interaction between inaterials and rays. Is this paper.the first section gives a brief introduction of the principle of CT. The second section describes tbe fuudamental of CT image reconstruction. The third section forusses the algorithms of reconstruction, emphasizing on Filter Back-Projection algorithm. The results of simulating experiment are shown in the fourth section. And the last section presents the directions for further work.