| 基于小波变换的低剂量CT投影数据滤波方法研究 |
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| 引用本文： | 张喜乐,黄静,刘楠,路利军,马建华,陈武凡.基于小波变换的低剂量CT投影数据滤波方法研究[J].CT理论与应用研究,2011,20(2):163-171. |
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| 作者姓名： | 张喜乐 黄静 刘楠 路利军 马建华 陈武凡 |
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| 作者单位： | 南方医科大学生物医学工程学院,广州,510515 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)(2010CB732503); 国家自然科学基金(81000613) |
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| 摘 要： | 本文根据低剂量CT投影数据的噪声特性,提出了一种基于小波变换的低剂量CT投影数据三维块匹配(BM3D)滤波方法.新方法首先对经过Anscombe变换的低剂量CT投影数据进行小波分解,然后分别对分解后尺度系数和小波系数进行BM3D滤波,接着对滤波后的系数进行逆小波变换和Anscombe逆变换,最后对处理后的投影数据采用经...
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| 关 键 词： | 小波变换 BM3D滤波 低剂量CT |
Wavelet-Transform Based Low-Dose CT Projection Filtering |
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| ZHANG Xi-le,HUANG Jing,LIU Nan,LU Li-jun,MA Jian-hua,CHEN Wu-fan.Wavelet-Transform Based Low-Dose CT Projection Filtering[J].Computerized Tomography Theory and Applications,2011,20(2):163-171. |
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| Authors: | ZHANG Xi-le HUANG Jing LIU Nan LU Li-jun MA Jian-hua CHEN Wu-fan |
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| Institution: | ZHANG Xi-le,HUANG Jing,LIU Nan,LU Li-jun,MA Jian-hua,CHEN Wu-fan(School of Biomedical Engineering,Southern Medical University,Guangzhou 510515,China) |
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| Abstract: | According to the property of the low-dose CT projection noise,this paper propose a wavelet-transform based low-dose CT projection BM3D Filtering(Block-Matching and 3D filtering)technique.For the proposed method,first,low-dose projection data is decomposed by Haar-wavelet transform after Anscombe transform.And then the efficient BM3D algorithm is performed separately in the scale coefficient and the wavelet coefficients.Next,the filtered coefficients are transformed orderly by inverse Anscombe transform and ... |
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| Keywords: | Wavelet transform BM3D filtering low-dose CT |
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