Electricity: measuring and testing – Particle precession resonance – Spectrometer components
Patent
1990-01-16
1991-08-20
Tokar, Michael J.
Electricity: measuring and testing
Particle precession resonance
Spectrometer components
324322, G01R 3320
Patent
active
050417908
ABSTRACT:
A hybrid bird cage/Helmholtz RF coil provides a single composite RF coil for MRI spectroscopy involving at least two NMR nuclear species at respectively different RF frequencies. The bird cage portion may be tuned to the lower NMR frequency and coupled to a pair of quadrature-phase input/output ports so as to provide needed extra sensitivity and signal-to-noise ratio. At least one further RF input/output port provides coupling for a second, higher, MNR RF frequency.
REFERENCES:
patent: 4050009 (1977-09-01), Sagalyn
patent: 4502008 (1985-02-01), Ohuchi
patent: 4751464 (1988-06-01), Bridges
Derby Kevin A.
Tropp James S.
Tokar Michael J.
Toshiba America MRI Inc.
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