RU2012139049A - PULSE SEQUENCE FOR MEASURING SELF-DIFFUSION PARAMETERS BY NUCLEAR MAGNETIC RESONANCE - Google Patents
PULSE SEQUENCE FOR MEASURING SELF-DIFFUSION PARAMETERS BY NUCLEAR MAGNETIC RESONANCE Download PDFInfo
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- RU2012139049A RU2012139049A RU2012139049/28A RU2012139049A RU2012139049A RU 2012139049 A RU2012139049 A RU 2012139049A RU 2012139049/28 A RU2012139049/28 A RU 2012139049/28A RU 2012139049 A RU2012139049 A RU 2012139049A RU 2012139049 A RU2012139049 A RU 2012139049A
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Abstract
Способ определения диффузионного затухания, диффузионного спада и коэффициента самодиффузии, включающий измерение амплитуды сигнала спинового эха, регистрируемой в момент времени 2 т или получаемой усреднением по интервалу времени вокруг этого момента в цикле импульсной последовательности, состоящим из 90-градусного импульса, 180-градусного импульса, подаваемого через время т, включающим два одинаковых градиентных импульса, подаваемых в промежутке между радиочастотными импульсами и между вторым радиочастотным импульсом и регистрацией амплитуды эха, отличающийся тем, что до подачи 90-градусного импульса формируют заданное количество градиентных импульсов, амплитудой, длительностью и формой совпадающих с градиентными импульсами, входящими в цикл измерительной последовательности, интервалы между которыми и между последним из них и первым градиентным импульсом цикла совпадают с интервалом между градиентными импульсами цикла.A method for determining diffusion attenuation, diffusion decay, and self-diffusion coefficient, including measuring the amplitude of a spin echo signal recorded at a time of 2 tons or obtained by averaging over the time interval around this moment in a pulse sequence cycle consisting of a 90-degree pulse, a 180-degree pulse, fed through time t, including two identical gradient pulses applied between the radio frequency pulses and between the second radio frequency pulse and the recording echo amplitudes, characterized in that prior to the supply of a 90-degree pulse, a predetermined number of gradient pulses is formed with the amplitude, duration and shape of the pulse coinciding with the gradient pulses included in the measuring sequence cycle, the intervals between which and between the last of them and the first gradient pulse of the cycle coincide with interval between gradient pulses of the cycle.
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RU2012139049/28A RU2517762C2 (en) | 2012-09-12 | 2012-09-12 | Pulse sequence to measure parameters of self-diffusion by method of nuclear magnetic resonance |
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RU2012139049/28A RU2517762C2 (en) | 2012-09-12 | 2012-09-12 | Pulse sequence to measure parameters of self-diffusion by method of nuclear magnetic resonance |
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RU2012139049A true RU2012139049A (en) | 2014-03-20 |
RU2517762C2 RU2517762C2 (en) | 2014-05-27 |
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RU2012139049/28A RU2517762C2 (en) | 2012-09-12 | 2012-09-12 | Pulse sequence to measure parameters of self-diffusion by method of nuclear magnetic resonance |
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Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
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SU544901A1 (en) * | 1974-12-10 | 1977-01-30 | Казанский Ордена Трудового Красного Знамени Государственный Университет Имени В.И.Ульянова-Ленина | Method for determining magnitude of impulse gradient magnetic field |
US6522136B1 (en) * | 1999-12-10 | 2003-02-18 | Schlumberger Technology Corporation | Well logging technique and apparatus for determining pore characteristics of earth formations using magnetic resonance |
US6462542B1 (en) * | 2000-07-21 | 2002-10-08 | Schlumberger Technology Corporation | Nuclear magnetic resonance measurements and methods of analyzing nuclear magnetic resonance data |
US7034528B2 (en) * | 2003-02-27 | 2006-04-25 | Schlumberger Technology Corporation | Methods for formation evaluation based on multi-dimensional representation of nuclear magnetic resonance data |
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RU2517762C2 (en) | 2014-05-27 |
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Effective date: 20210517 |