| 基于FDK算法的三维CT系统性能评估理论方法研究 |
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| 引用本文： | 蔡东山,施成,邢宇翔.基于FDK算法的三维CT系统性能评估理论方法研究[J].CT理论与应用研究,2011,20(4):513-522. |
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| 作者姓名： | 蔡东山 施成 邢宇翔 |
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| 作者单位： | 1. 清华大学工程物理系,北京,100084
2. 清华大学粒子技术与辐射成像教育部重点实验室,北京,100084 |
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| 基金项目： | 国家自然科学基金(60772051) |
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| 摘 要： | 随着医学应用和工业应用对X射线剂量、三维物体的成像速度的要求越来越严格,三维CT成像已经成为必然趋势,因此有必要对三维CT系统性能进行研究。本文首先建立三维CT图像噪声的理论估计方法,接着提出了基于FDK算法的三维CT系统性能评估的4种解析计算方法,使用高斯差模型作为通道函数。通过实验我们验证了本文提出的三维CT系统性...
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| 关 键 词： | 三维X射线 噪声评估 信噪比 通道化观察器 |
Research on Theoretical Estimation of System Performance for 3D X-ray CT with FDK Reconstruction |
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| CAI Dong-shan,SHI Cheng,XING Yu-xiang.Research on Theoretical Estimation of System Performance for 3D X-ray CT with FDK Reconstruction[J].Computerized Tomography Theory and Applications,2011,20(4):513-522. |
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| Authors: | CAI Dong-shan SHI Cheng XING Yu-xiang |
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| Institution: | CAI Dong-shan,SHI Cheng,XING Yu-xiang (Department of Engineering Physics,Tsinghua University,Beijing 100084,China) |
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| Abstract: | Since X-ray CT dosage has been pushed to a low level and 3D imaging has been a trend,it is necessary to study the performance of 3D X-ray CT systems.In this work,we firstly propose a theoretical noise estimation method for 3D X-ray CT reconstructions.Then,we present four models for theoretical estimation of system performance for 3D X-ray CT based on FDK algorithm.The theories and analysis are based on Channellized Hotelling Observer(CHO).The Difference Of Gaussian(DOG)model is adapted for channels.The theo... |
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| Keywords: | 3D X-ray noise estimation signal to noise ratio channellized hotelling observer |
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