| 高斯噪声对DTI参数MD和FA的影响 |
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| 引用本文： | 王芳,邓振生,张娜. 高斯噪声对DTI参数MD和FA的影响[J]. 北京生物医学工程, 2010, 29(1): 39-43. DOI: 10.3969/j.issn.1002-3208.2010.01.08 |
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| 作者姓名： | 王芳 邓振生 张娜 |
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| 作者单位： | 中南大学生物医学工程研究所,长沙,410083;中国科学院深圳先进技术研究院生物医学与健康工程研究所,深圳,518055 |
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| 摘 要： | 目的探索弥散张量成像(diffusion tensor imaging,DTI)中高斯白噪声对参数平均弥散率(mean diffusion,MD)和各向异性分数(fractional anisotropy,FA)的影响。材料和方法计算多个感兴趣区的MD和FA值,分析这两个参数随高斯噪声方差的变化趋势。结果在所研究的方差范围内,MD不受高斯噪声的影响,且图像视觉效果变化也很小;但FA参数受到高斯噪声的影响很大,图像视觉效果严重下降。结论DTI参数MD具有较强的鲁棒性,而FA受噪声的干扰较大,临床上适当折衷之后,可以允许一定噪声存在以增加图像细节。
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| 关 键 词： | 弥散张量成像 MD FA 高斯噪声 |
The Effect of Gaussian Noise on the DTI parameters of MD and FA |
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| WANG Fang,DENG Zhensheng,ZHANG Na. The Effect of Gaussian Noise on the DTI parameters of MD and FA[J]. Beijing Biomedical Engineering, 2010, 29(1): 39-43. DOI: 10.3969/j.issn.1002-3208.2010.01.08 |
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| Authors: | WANG Fang DENG Zhensheng ZHANG Na |
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| Affiliation: | 1. Institute of Biomedical Engineering, Central South University, Changsha 410083; 2. Institute of Biomedical and Health Engineering, Shenzhen Institute of Advanced Technology, Chinese Academy of Scienee , Shenzhen , Guangdong Province 518055) |
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| Abstract: | Objective Research the effect of Gaussian noise on the DTI parameters MD and FA. Materials and Methods Calculate the MD and FA values in ROIs, and analyze the relationship between MD, FA and the variances of gaussian noise. Results In a specific range, Gaussian noise almost has no influence on MD, and the visual performan change slightly. However the Gaussian noise influences FA evidently and the visual performance decrease gradually. Conclusion DTI parameter MD is more stable than parameter FA and certain noise can exist to reserve more image details. |
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| Keywords: | MD FA |
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