Relaxation time estimation in surface NMR
Abstract
NMR relaxation time estimation methods and corresponding apparatus generate two or more alternating current transmit pulses with arbitrary amplitudes, time delays, and relative phases; apply a surface NMR acquisition scheme in which initial preparatory pulses, the properties of which may be fixed across a set of multiple acquisition sequence, are transmitted at the start of each acquisition sequence and are followed by one or more depth sensitive pulses, the pulse moments of which are varied across the set of multiple acquisition sequences; and apply processing techniques in which recorded NMR response data are used to estimate NMR properties and the relaxation times T.sub.1 and T.sub.2* as a function of position as well as one-dimensional and two-dimension distributions of T.sub.1 versus T.sub.2* as a function of subsurface position.
- Inventors:
- Issue Date:
- Research Org.:
- VISTA CLARA INC. Mukilteo, WA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1347572
- Patent Number(s):
- 9599688
- Application Number:
- 13/750,984
- Assignee:
- VISTA CLARA INC.
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
G - PHYSICS G01 - MEASURING G01R - MEASURING ELECTRIC VARIABLES
- DOE Contract Number:
- FG02-08ER84979
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 2013 Jan 25
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Citation Formats
Grunewald, Elliot D., and Walsh, David O. Relaxation time estimation in surface NMR. United States: N. p., 2017.
Web.
Grunewald, Elliot D., & Walsh, David O. Relaxation time estimation in surface NMR. United States.
Grunewald, Elliot D., and Walsh, David O. Tue .
"Relaxation time estimation in surface NMR". United States. https://www.osti.gov/servlets/purl/1347572.
@article{osti_1347572,
title = {Relaxation time estimation in surface NMR},
author = {Grunewald, Elliot D. and Walsh, David O.},
abstractNote = {NMR relaxation time estimation methods and corresponding apparatus generate two or more alternating current transmit pulses with arbitrary amplitudes, time delays, and relative phases; apply a surface NMR acquisition scheme in which initial preparatory pulses, the properties of which may be fixed across a set of multiple acquisition sequence, are transmitted at the start of each acquisition sequence and are followed by one or more depth sensitive pulses, the pulse moments of which are varied across the set of multiple acquisition sequences; and apply processing techniques in which recorded NMR response data are used to estimate NMR properties and the relaxation times T.sub.1 and T.sub.2* as a function of position as well as one-dimensional and two-dimension distributions of T.sub.1 versus T.sub.2* as a function of subsurface position.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2017},
month = {3}
}