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| 一种新的用于磁共振扩散加权波谱术的扩散敏感梯度磁场施加方案 | |
| 引用本文： | 张怀岑,王翔,高嵩.一种新的用于磁共振扩散加权波谱术的扩散敏感梯度磁场施加方案[J].航天医学与医学工程,2011,24(3):215-217. |
| 作者姓名： | 张怀岑 王翔 高嵩 |
| 作者单位： | 1. 广东医学院信息工程学院,广东东莞,523808,中国 2. Engineering School, Jinggangshan University, Ji-an Jiangxi 343009,China 3. Medical Imaging Physics Laboratory, Peking University Health Science Center, Beijing 100191 ,China |
| 基金项目： | Supported by the Natural Science Foundation of Beijing，Dongguan Higher School and Institute Development Foundation，The Scientific Research Key Program of Beijing Municipal Commission of Education |
| 摘 要： | 目的 提出一种基于PRESS的用于磁共振扩散加权波谱的扩散敏感梯度磁场施加方案.方法 在PRESS序列中的2个π射频脉冲两侧各施加一对交错的扩散敏感梯度磁场.结果 本方案有效减小涡流,利用PRESS序列中2个π射频脉冲之间的时间,延长了扩散梯度磁场脉冲的持续时间.即使在扩散权重较大的情况下,Naa,Cr及Cho的峰仍十... |
| 关 键 词： | 扩散加权成像 扩散加权波谱 扩散敏感梯度磁场 |
A Novel Implement Scheme of Diffusion Sensitive Gradient Magnetic Field for Magnetic Resonance Diffusion Weighted Spectroscopy |
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| ZHANG Huai-ling,WANG Xiang,GAO Song.A Novel Implement Scheme of Diffusion Sensitive Gradient Magnetic Field for Magnetic Resonance Diffusion Weighted Spectroscopy[J].Space Medicine & Medical Engineering,2011,24(3):215-217. | |
| Authors: | ZHANG Huai-ling WANG Xiang GAO Song |
| Institution: | 1.School of Information Engineering,Guangdong Medical University,Dongguan Guangdong 523808,China;2.Engineering School,Jinggangshan University,Ji-an Jiangxi 343009,China;3.Medical Imaging Physics Laboratory,Peking University Health Science Center,Beijing 100191,China) |
| Abstract: | Objective To propose a new diffusion sensitive gradient magnetic field implement scheme basing on point resolved spectroscopy( PRESS) for magnetic resonance diffusion weighted spectroscopy. Methods Two pairs of interleaving pulsed gradient magnetic fields were applied symmetrically around the two π RF pulse in PRESS sequence respectively. Results Through the proposed scheme, the induced eddy currents were minimized , the interval time between the two π RF pulses in PRESS sequence was utilized effectively and the duration time of diffusion sensitive gradient magnetic pulses was increased. Conclusion It is feasible to implement diffusion weighted spectroscopy(DWS) in conventional clinical MRI scanners with this scheme. |
| Keywords: | diffusion weighted imaging diffusion weighted spectrum diffusion sensitive gradient magnetic field |
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