Patent ID: 7852077
Filing Date: 2010-12-14
Classification: G01N,G01R

Abstract:
1. A method of determining two or more variables from nuclear magnetic resonance (NMR) measurements in a sample the method comprising: initially magnetizing the sample; disturbing the initial magnetization with a first series of RF pulses; after a recovery time period has elapsed, applying a second series of RF pulses to the sample to acquire a first signal comprising at least two echoes; disturbing the initial magnetization differently with a third series of RF pulses; after the recovery time period has elapsed, applying a fourth series of RF pulses to the sample to acquire a second signal comprising at least two echoes; distinguishing between each coherence pathway component from the at least two coherence pathway components so as to obtain a difference signal from the first signal and the second signal; and analyzing the difference signal to obtain the two or more variables, wherein the two or more variables is from the group consisting of a longitudinal relaxation time, a transverse relaxation time, a diffusion coefficient or a flow rate.