Multiple frequency method for nuclear magnetic resonance longitudinal relaxation measurement and pulsing sequence for power use optimization
OwnerGersh Zvi Taicher, Arcady Reidermaninventors
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Abstract
A method for determining nuclear magnetic resonance longitudinal relaxation time of a medium. The method includes magnetically polarizing nuclei in the medium along a static magnetic field, momentarily inverting the magnetic polarization of the nuclei within each one of a plurality of different spatial volumes within the medium, transversely magnetizing the nuclei in each one of the spatial volumes after an individual recovery time corresponding to each one of the spatial volumes, and measuring an amplitude of a magnetic resonance signal from each one of the spatial volumes.
Claims10
A method for determining nuclear magnetic resonance longitudinal relaxation time of a medium, comprising:
- magnetically polarizing nuclei in said medium along a static magnetic field;
- momentarily inverting said magnetic polarization of said nuclei within each one of a plurality of different spatial volumes within said medium;
- transversely magnetizing said nuclei in each one of said spatial volumes after a different recovery time for each one of said spatial volumes;
- and
- measuring a magnetic resonance signal from each one of said spatial volumes.
A method of nuclear magnetic resonance measurement of a medium, comprising:
- magnetically polarizing nuclei in said medium with a static magnetic field;
- acquiring a first CPMG echo train in a first sensitive volume having a duration large enough to determine presence of slowly relaxing components in said medium;
- acquiring a plurality of additional CPMG echo trains, each of said additional echo trains corresponding to a different sensitive volume, each of said additional CPMG echo trains having a duration less than said duration and echo spacing of said first CPMG echo train.
Dependencies are inferred from the claim text.