Magnetic resonance spectroscopic imaging having reduced parasiti

Details Magnetic resonance spectroscopic imaging having reduced parasiti Magnetic resonance spectroscopic imaging having reduced parasiti

1997-11-24

2000-05-30

Oda, Christine K.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

324309, 324300, 600410, G01V 300

Patent

active

060694785

ABSTRACT:
A pure water subtraction method for eliminating interfering sidebands of residual water including spurious signals from extraneous sources such as eddy current effects, Bo magnetic field drift, patient motion and the like. Unsuppressed and partially water suppressed magnetic signal data are obtained, and a low frequency water-phase-correction is applied thereto. The water phase corrected partially suppressed data is subtracted from the water phase corrected unsuppressed data to get a pure water reference (i.e. metabolite signals cancel). A scaled version of the pure water reference is subtracted from the partially suppressed data to eliminate spurious water signals.

REFERENCES:
Peter G. Webb et al., "Automated Single-Voxel Proton MRS: Technical Development and Multisite Verification", Magnetic Resonance in Medicine 31, (1994), pp. 365-373.
Andrew Gibbs et al., "Reference Deconvolution. Elimination of Distortions Arising from Reference Line Truncation", Journal of Magnetic Resonance 91, (1991), pp. 77-83.
A. A. de Graaf et al., "Quality: A General Method for Lineshape COrrection in In Vivo NMR SPectroscopy", (1998), 8th Annual SMRM, p. 244.
Gareth A. Morris, "Compensaiton of Instrumental Imperfections by Deconvolution Using an Internal Reference Signal", Journal of Magnetic Resonance 80, (1988), pp. 547-552.

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