| 基于傅立叶变换的射频场分布测量方法 |
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| 引用本文： | 王鹤,张磊,宁瑞鹏,李鲠颖.基于傅立叶变换的射频场分布测量方法[J].波谱学杂志,2007,24(4):446-453. |
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| 作者姓名： | 王鹤 张磊 宁瑞鹏 李鲠颖 |
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| 作者单位： | 1.上海市功能磁共振成像重点实验室，华东师范大学 物理系，上海 200062;;
2.上海爱申科技发展股份有限公司, 上海 201203 |
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| 摘 要： | 提出了一种基于傅立叶变换的射频场分布测量方法，该方法可以方便地测量出射频场的分布，其测量结果与样品的均匀度无关并且可以分别观测某个像素点处的层内射频场非均匀性或某个小区域内的射频场非均匀性.
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| 关 键 词： | 傅立叶变换 射频线圈 射频场分布 磁共振成像 |
| 文章编号： | 1000-4556（2007）04-0446-08 |
| 收稿时间： | 2007-08-28 |
| 修稿时间： | 2007年8月28日 |
A Method for RF-field Mapping Based on Fourier Transformation |
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| WANG He,ZHANG Lei,NING Rui-peng,LI Geng-ying.A Method for RF-field Mapping Based on Fourier Transformation[J].Chinese Journal of Magnetic Resonance,2007,24(4):446-453. |
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| Authors: | WANG He ZHANG Lei NING Rui-peng LI Geng-ying |
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| Institution: | 1.Shanghai Key Laboratory of Functional Magnetic Resonance Imaging, Department of Physics, East China Normal University, Shanghai 200062, China； ;
2.Shanghai A&S Science Technology Development Co., Ltd., Shanghai 201203, China |
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| Abstract: | A Fourier Transformation (FT)-based method for measuring the RF-field distribution was proposed. This method can be easily implemented to estimate the quality of RF coils and the results obtained are not related to the inhomogeneity of the samples. Compared to the commonly used fitting method, the FT method has two advantages. Firstly, it does not require setting initial values for computation. Secondly, the proposed method is capable of detecting in slice RF field inhomogeneity of a single pixel or a small domain. |
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| Keywords: | Fourier transformation RF coil RF-field distribution MRI |
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