| 用于低场磁共振T_1、T_2测量的序列 |
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| 引用本文： | 赵立,应葵,赵磊,章炜炜.用于低场磁共振T_1、T_2测量的序列[J].清华大学学报(自然科学版),2009(2). |
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| 作者姓名： | 赵立 应葵 赵磊 章炜炜 |
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| 作者单位： | 清华大学工程物理系粒子物理与辐射成像教育部重点实验室;新奥博为技术有限公司;Harvard;Medical;School;Brigham;Women's;Hospital; |
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| 摘 要： | 为了测量低场磁共振设备参数,该文提出一种对硬件要求不高,可以较快测量T1、T2数据的方法。通过对基本序列进行研究,充分利用由3个射频激发产生信号的信息,设计读取梯度对它们进行区分,完成了可以在一次扫描中同时测量T1、T2参数的刺激回波(stimulated echo,STE)序列。该序列在0.3T低场设备上进行了包括水模和人体在内的测量实验,测量时间相对同时使用传统自旋回波序列(spin echo,SE)、反转恢复回波序列(inversion recovery,IR)减少一半。测量结果证明STE是一种适合于低场环境参数测量使用的序列。
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| 关 键 词： | 磁共振成像 快速序列 T1图谱 T2图谱 |
Sequence for T_1 and T_2 mapping in low field magnetic resonance imaging |
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| ZHAO Li,YING Kui,ZHAO Lei,ZHANG Weiwei.Sequence for T_1 and T_2 mapping in low field magnetic resonance imaging[J].Journal of Tsinghua University(Science and Technology),2009(2). |
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| Authors: | ZHAO Li YING Kui ZHAO Lei ZHANG Weiwei |
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| Institution: | 1.Key Laboratory of Particle & Radiation Imaging of Ministry of Education;Department of Engineering Physics;Tsinghua University;Beijing 100084;China;2.XinAoMDT Technology Co;Ltd;Langfang 065001;3.Harvard Medical School & Brigham and Women's Hospital;Boston;MA02115;USA |
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| Abstract: | A new sequence which requires relatively simple hardware is developed to measure the basic T1 and T2 in low field magnetic resonance imaging(MRI).The three radio frequency pulses with specifically designed gradients are implemented so that T1 and T2 can be simultaneously sampled in both stimulated echo and spin echo.All the experiments,including phantom and human studies,were carried out on a 0.3 T scanner.The total scan time is reduced by 50% in comparison with traditional methods combining spin echo and i... |
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| 本文献已被 CNKI 等数据库收录！ |
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