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US5166616A Method for recording spin resonance spectra 失效
标题翻译：记录自旋共振谱的方法
公开(公告)号：US5166616A
公开(公告)日：1992-11-24
申请号：US654651
申请日：1991-02-12
申请人： David M. Doddrell , Grahmam J. Galloway , Ian M. Brereton
发明人： David M. Doddrell , Grahmam J. Galloway , Ian M. Brereton
IPC分类号： A61B5/055 , G01N24/12 , G01R33/46 , G01R33/483
CPC分类号： G01R33/4608 , G01R33/4833
摘要： A method serving for recording spin resonance spectra of test samples having at least two groups (CH.sub.3, CH) of nuclei of the same kind and of substantially identical chemical shift, comprises the step of suppressing the signal of the second group (CH) for the purpose of obtaining an isolated image of the signal of the first group (CH.sub.3). To this end, a pulse sequence of four r.f. pulses, preferably 90.degree. r.f. pulses (10, 12, 13, 14), are irradiated upon the sample. The first r.f. pulse (10) is a soft pulse, selective for the nuclei of the first group (CH.sub.3). The second r.f. pulse (12) is a soft pulse, selective for the nuclei of the second group (CH), and causes the magnetizations of the nuclei of the first group (CH.sub.3) and of the second group (CH) to be transferred, at least in part, to a state of multiple-quantum coherence. Immediately following the second r.f. pulse (12) the third r.f. pulse (13), being at least one hard pulse, is irradiated upon the sample, and is adjusted in such a way that the multiple-quantum coherence is transferred to a correlated z-order state. A dephased magnetic gradient field pulse (15) is exerted upon the sample (30) in the interval .tau..sub.HS between the third r.f. pulse (13) and the fourth r.f. pulse (14). The fourth r.f. pulse (14) is a soft pulse, selective for the nuclei of the first group (CH.sub.3). It is adjusted in such a way that the correlated z-order state is re-transferred to a state of single-quantum coherence of the nuclei of the second group (CH). Thereafter one detects the resonance signal of the nuclei of the first group (CH.sub.3).
摘要翻译： PCT No.PCT / DE90 / 00308第 371日期1991年2月12日 102（e）日期1991年2月12日PCT提交1990年4月27日PCT公布。出版物WO90 / 13825 日期为1990年11月15日。用于记录具有相同种类和基本相同化学位移的至少两个核（CH 3，CH）基团的测试样品的自旋共振光谱的方法包括以下步骤：第二组（CH），用于获得第一组（CH 3）的信号的孤立图像。为此，脉冲序列为4 r.f. 脉冲，优选90°r.f。脉冲（10,12,13,14）照射在样品上。第一个r.f. 脉冲（10）是对第一组（CH 3）的核选择性的软脉冲。第二个r.f. 脉冲（12）是对第二组（CH）的核选择性的软脉冲，并且使得第一组（CH 3）和第二组（CH）的核的磁化至少在部分，到多量子一致性的状态。紧随第二个r.f. 脉冲（12）第三个r.f. 作为至少一个硬脉冲的脉冲（13）被照射在样本上，并且以使得多量子相干被转移到相关的z阶状态的方式进行调整。在第三个r.f.之间的间隔τHS中，对样本（30）施加去相位的磁梯度场脉冲（15）。脉冲（13）和第四个r.f. 脉冲（14）。第四个r.f. 脉冲（14）是对第一组（CH 3）的核选择性的软脉冲。以相关的z阶状态被重新转移到第二组（CH）的核的单量子相干状态的方式进行调整。其后，检测第一组（CH 3）的核的共振信号。

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