| 基于xy非线性梯度场磁共振成像研究 |
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| 引用本文： | 徐雅洁,杨晓冬.基于xy非线性梯度场磁共振成像研究[J].北京理工大学学报,2016,36(1):64-69. |
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| 作者姓名： | 徐雅洁 杨晓冬 |
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| 作者单位： | 中国科学院苏州生物医学工程技术研究所,江苏,苏州215163;中国科学院大学,北京100049;中国科学院苏州生物医学工程技术研究所,江苏,苏州215163 |
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| 基金项目： | 国家自然科学基金资助项目(11105096);苏州市科技资助项目(SYG201125,SH201207) |
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| 摘 要： | 为解决非线性梯度成像中心分辨率低的问题,提出了一种基于xy非线性梯度场的成像方法,并讨论了非线性梯度场中心分布曲线对磁共振图像的影响. 研究结果表明,在半径r=1.5时,圆形中心分布曲线的图像重建结果最优;与O-Space技术对比实验表明,xy非线性梯度场在不同加速因子R下都得到了更好的重建结果.
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| 关 键 词： | 非线性梯度场成像 中心分布曲线 CG迭代算法 |
| 收稿时间： | 2013/7/24 0:00:00 |
MRI Imaging Technology Based on xy Nonlinear Gradient |
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| XU Ya-jie and YANG Xiao-dong.MRI Imaging Technology Based on xy Nonlinear Gradient[J].Journal of Beijing Institute of Technology(Natural Science Edition),2016,36(1):64-69. |
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| Authors: | XU Ya-jie and YANG Xiao-dong |
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| Institution: | 1.Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou, Jiangsu 215163, China;University of Chinese Academy of Sciences, Beijing 100049, China2.Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, Suzhou, Jiangsu 215163, China |
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| Abstract: | To eliminate center blurring existing in nonlinear gradient imaging, an imaging technology based on xy nonlinear gradient field was proposed, and the effect of center displacement curve in magnetic resonance imaging (MRI) was discussed. The results reveal that circle center displacement curve with diameter r=1.5 achieves the best reconstruction, and in comparison experiment with O-Space under different acceleration factor R, xy nonlinear magnetic field achieves a better image result. |
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| Keywords: | nonlinear gradient imaging center placement curve CG iterative algorithm |
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