| 基于Bayesian非局部先验的低剂量X-射线CT成像 |
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| 引用本文： | 高大志,陈阳,杨刚,卢光明. 基于Bayesian非局部先验的低剂量X-射线CT成像[J]. 医疗设备信息, 2011, 0(2): 21-24,41 |
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| 作者姓名： | 高大志 陈阳 杨刚 卢光明 |
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| 作者单位： | 南京军区南京总医院医学影像科;东南大学生物医学工程学院医学信息研究所; |
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| 基金项目： | 国家自然科学基金(81000636)资助 |
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| 摘 要： | 目的降低病人在CT扫描中所受的辐射剂量。方法在低剂量的扫描条件下,由于有效投影信息的缺少,CT图像易受到量子噪声的影响。本文提出了一种新的非局部先验Bayesian重建算法来提高CT图像重建质量。结果与传统的图像重建方法比较,本文提出的重建方法,能够利用目标图像中更多形态结构的全局信息来构建先验项,从而克服了传统图像重建信息局限性的缺点。结论试验证明本文所提出的CT图像重建方法在低剂量扫描条件下具有很好的表现。
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| 关 键 词： | 螺旋CT CT成像 Bayesian 低剂量扫描 |
Low-dose X-ray Computed Tomography Based on Bayesian Nonlocal Prior |
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| GAO Da-zhi,CHEN Yang,YANG Gang,LU Guang-ming .Medical Imaging Department,Nanjing General Hospital of Nanjing Military Area Comm,Nanjing Jiangsu ,China. Low-dose X-ray Computed Tomography Based on Bayesian Nonlocal Prior[J]. Information of Medical Equipment, 2011, 0(2): 21-24,41 |
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| Authors: | GAO Da-zhi CHEN Yang YANG Gang LU Guang-ming .Medical Imaging Department Nanjing General Hospital of Nanjing Military Area Comm Nanjing Jiangsu China |
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| Affiliation: | GAO Da-zhi1,CHEN Yang2,YANG Gang1,LU Guang-ming1 1.Medical Imaging Department,Nanjing General Hospital of Nanjing Military Area Command,Nanjing Jiangsu 210002,China,2.Institute of Medical Information&Technology,School of Biomedical Engineering,Southeast University,Nanjing Jiangsu 210000 |
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| Abstract: | Objective To reduce the radiation dose delivered to the patients during the application of computed tomography(CT).Methods CT images can be easily degraded by the quantum noise under low X-ray dose scan protocols.Statistical reconstructions outperform the traditional filtered back-projection(FBP) reconstructions by accurately modeling the scan system and the measurement statistics.This paper aims to improve the CT reconstruction using a new nonlocal prior statistical reconstruction approach.Results Compared... |
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| Keywords: | spiral CT CT imaging Bayesian arithmetic low-dose scanning |
| 本文献已被 CNKI 维普 等数据库收录！ |
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