Preamplifier circuit for magnetic resonance system

Details Preamplifier circuit for magnetic resonance system Preamplifier circuit for magnetic resonance system

1995-03-21

1996-08-13

Arana, Louis M.

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

324318, G01V 300

Patent

active

055459994

ABSTRACT:
A circuit for amplifying signals received by the receive coil of a magnetic resonance (MR) system includes a preamplifier employing an active circuit device, such as a GaAs-MESFET or HEMT. The preamplifier is located proximate to the receive coil in order to maintain as high a signal-to-noise ratio as possible for the preamplifier output signals. A capacitance is coupled to the receive coil to form an input impedance matching network for the input of the preamplifier. The preamplifier output is coupled through a fiber optic cable to remotely located MR signal processing electronics, which further processes signals received by the MR receive coil and amplified by the preamplifier.

REFERENCES:
patent: 4737712 (1988-04-01), Stormont et al.
patent: 4763075 (1988-08-01), Weigert
patent: 5245288 (1993-09-01), Leussler

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