发明名称 |
NMR detection of small amount of fast transversal relaxation component in mixtures |
摘要 |
The present invention provides an improved NMR sequence for detecting small amount of a substance having short NMR transversal relaxation in the presence of a large amount of a substance having long NMR relaxation. A sequence of pulses enables the original z-oriented magnetization vector of a substance to experience differing reorientation effects based on the relative transverse relaxation rate of the substance. After said pulse sequence, a substance with long transverse relaxation experiences a substantial inversion of its nuclear magnetization vector, while a substance with short transverse relaxation experiences a nearly zero value of its vector. After a determinable wait time, said vectors can be shown to experience recognizably different behavior under the application of a CPMG sequence of pulses. Appropriate wait time can be determined by zeroing out spin echoes during the CPMG pulse sequence.
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申请公布号 |
US6882147(B2) |
申请公布日期 |
2005.04.19 |
申请号 |
US20030649423 |
申请日期 |
2003.08.27 |
申请人 |
BAKER HUGHES INCORPORATED |
发明人 |
TAICHER GERSH ZVI;REIDERMAN ARCADY |
分类号 |
G01R33/44;G01R33/50;G01V3/32;(IPC1-7):G01V3/00 |
主分类号 |
G01R33/44 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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