Method of and device for automatic phase correction of complex N

Details Method of and device for automatic phase correction of complex N Method of and device for automatic phase correction of complex N

1988-11-14

1989-10-24

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

324309, G01R 3320

Patent

active

048765074

ABSTRACT:
A method is proposed for the automatic correction of phase errors in NMR spectra. The phase errors are interalia due to deficiencies of the NMR hardware, the time-shifted sampling of a magnetic resonance signal after the appearance thereof. The phase correction is performed by first determining peak locations in a modulus spectrum determined from the complex spectrum and by determining the phases in the peak locations, after which the phase in the peak locations are fitted to a predetermined polynomial by means of a least-squares optimization procedure. The coefficients of the polynomial are thus defined. Subsequently, the NMR spectrum is point-wise corrected by means of the phase polynomial determined. The proposed method can be simply implemented in a NMR device; no severe requirements are imposed as regards the signal-to-noise ratio and the resolution of the spectrum. In practical situations an NMR spectrum usually comprises many spectral lines. Therefore, the method is not susceptible to the effects of overlapping spectral lines.

REFERENCES:
patent: 4613949 (1986-09-01), Glover
patent: 4628262 (1986-12-01), Maudsley
patent: 4680546 (1987-07-01), Dumoulin
patent: 4695798 (1987-09-01), Brandes
patent: 4736160 (1988-04-01), Sano

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