Electricity: measuring and testing – Particle precession resonance – Spectrometer components
Reexamination Certificate
2011-07-26
2011-07-26
Shrivastav, Brij B (Department: 2858)
Electricity: measuring and testing
Particle precession resonance
Spectrometer components
C324S309000
Reexamination Certificate
active
07986143
ABSTRACT:
A multicoil NMR detection and imaging apparatus allows multicoil NMR detection and imaging to be performed efficiently at low operating frequencies. The apparatus comprises an AC voltage generator, a transmit switching circuit, a coil switching network, an array of two or more detection coils, a set of receive switching circuits with one switching circuit for each detection coil, and a set of preamplifier circuits with input impedance substantially greater than the impedance of each respective detection coil at the intended operating frequency. The AC generator produces an alternating current waveform that is routed through one of more detection coils during transmit mode while the preamplifier circuits are isolated from the detection coil(s). During receive mode the AC generator is isolated from the detection coils to prevent noise from the transmitter from degrading the quality of received signals.
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Gilder Nathaniel Ari
Jensen & Puntigam P.S.
Shrivastav Brij B
Vista Clara Inc.
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