三维锥束CT投影数据的模拟  

A Computer Simulation of Projection Data for 3D Cone-Beam CT

作　　者：惠苗[1] 潘晋孝[1] 

机构地区：[1]中北大学

出　　处：《微计算机信息》2007年第25期248-249,共2页Control & Automation

基　　金：国家自然科学基金资助项目(60532080)

摘　　要：三维锥束CT是目前研究的热点,也是医学CT和工业CT的发展方向。三维重建算法的可靠性和准确性的研究过程中,模型的设计以及投影数据的模拟是必不可少的一部分。本文详细介绍了3DShepp-Logan头部模型的设计思路、推导了等距锥束射线投影仿真公式,基于3DShepp-Logan头部模型进行了投影数据模拟,并利用FDK算法的重建结果验证了思路的可行性和模型计算的准确性。Recent research is mainly focused on 3D cone-beam CT which is one of the main developing directions of medical CT and industrial CT. The computer simulation of projection data plays an important role in the research for the accuracy of model computation and the feasibility of three-dimension reconstruction algorithm. The thesis introduced the design of 3D Shepp-Logan phantom and deducted the formula of projection simulation in the isometric X-ray cone-beam in detail. The numerical experiment gives the three-dimension projection data simulation based on 3D Shepp-Logan head phantom. Tthe results of image reconstruction indicate the accuracy of computation and the feasibility of our method using FDK.

关 键 词：三维锥束CT 投影数据 3DShepp-Logan头部模型 投影仿真公式 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]