| 脉冲形状对定域谱中水峰抑制作用的影响 |
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| 引用本文： | 丁广良,李丽云.脉冲形状对定域谱中水峰抑制作用的影响[J].波谱学杂志,1995,12(6):573-579. |
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| 作者姓名： | 丁广良 李丽云 |
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| 作者单位： | 中国科学院武汉物理研究所谱与原子分子物理国家重点实验室, 武汉 430071 |
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| 摘 要： | 报道了用MRI中STEAM方法获得定域谱(MRS)的实验结果,用相位正交、时间一长一短的二个特形脉冲对水峰进行预饱和照射,得到抑制水峰的MRS.这种方法抑制水峰的效果比用梯度散相压水峰的效果好。对于三种常见的特形脉冲,用GAUSS脉冲得到效果最好的实验结果。
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| 关 键 词： | 磁共振成像 定域波谱 水峰抑制 特形脉冲 |
| 收稿时间： | 1994-12-19 |
THE EFFECT OF PULSE SHAPE ON WATER SUPPRESSION IN LOCALIZED MRS |
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| Ding Guangliang,LiLiyun,Meng Qingan,Ye Chaohui.THE EFFECT OF PULSE SHAPE ON WATER SUPPRESSION IN LOCALIZED MRS[J].Chinese Journal of Magnetic Resonance,1995,12(6):573-579. |
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| Authors: | Ding Guangliang LiLiyun Meng Qingan Ye Chaohui |
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| Institution: | State Key Labomtory of Magnctic Rcsonanca and Atomic and Molecular Physics, Wuhan Institute of Physics, The Chinese Academy of Sciences, Wuhan 430071 |
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| Abstract: | This paper reports the experimental results of localized MRS using STEAM of MRI,in which the water signal in VOI is suppressed by presaturation radiation using shaped r.f pulses with two unequal widths in perpendicular phases.This water-suppression method is more effective than the dephasing method by gradient pulses.Among the threc kinds of common shaped pulses,the GAUSS shaped pulse is the best |
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| Keywords: | Magnetic Resonance Imaging (MRI) Localized Magnetic Resonance Soectroscopy (MRS) Water-suppression Shaped pulse |
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