Device for excitation and detection of magnetic resonance using

Details Device for excitation and detection of magnetic resonance using Device for excitation and detection of magnetic resonance using

1996-03-04

1998-02-17

O'Shea, Sandra L.

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

G01R 3336

Patent

active

057194998

ABSTRACT:
A device for excitation and detection of magnetic resonance is presented. The device is fashioned on the principle that electromagnetic radiation is effectively described by fewer independent parameters on considering its interaction with `spins` in a magnetic field, than would be the case in vacuum. In particular, the amplitude and phase of electromagnetic radiation are not independent of each other under such conditions. Complex pulse envelope shapes for excitation may be generated with this device either by pure amplitude modulation, or by pure phase modulation alone instead of by both amplitude and phase modulation). In the latter option, stable, efficient, low-droop Class `C` amplifiers and standard rectangular pulse envelopes may be employed, instead of linear Class `A` or `AB` amplifiers and complex em pulse envelope shapes. In detection mode, signal may be picked up from either one or both of the coils. The device is applicable for NMR and ESR/EPR spectroscopy, as well as transition selective NMR/ESR/EPR spectroscopy, volume localized NMR/ESR/EPR spectroscopy and NMR/ESR/EPR including in vivo applications.

REFERENCES:
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patent: 4766383 (1988-08-01), Fox et al.
patent: 5248943 (1993-09-01), Fox et al.
patent: 5521506 (1996-05-01), Misic et al.

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