Gradient amplifier system with flexible amplifier allocation

Details Gradient amplifier system with flexible amplifier allocation Gradient amplifier system with flexible amplifier allocation

1990-03-26

1991-11-19

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

324322, G01R 3320

Patent

active

050669141

ABSTRACT:
A magnetic resonance imaging system uses a pool of amplifiers to generate gradient signals. Each amplifier within the pool may be switched among any of the gradient axes, so as to efficiently allocate amplifier power among the gradients. In one embodiment, the amplifiers of the pools are connected in stacks by an input and output matrix comprised of mechanical switches driven in tandem by interlocked motors. The switches connect the outputs of the amplifiers in series. The input signal is "boot strapped" through the amplifier stack to provide proper signal level.

REFERENCES:
patent: 3808545 (1974-04-01), Stanley
patent: 4322684 (1982-03-01), Hounsfield
patent: 4613949 (1986-09-01), Glover et al.
patent: 4680545 (1987-07-01), Gray et al.
patent: 4680547 (1987-07-01), Leue et al.
patent: 4710716 (1987-12-01), Keren et al.
patent: 4901020 (1990-02-01), Ladebeck
patent: 4902973 (1990-02-01), Keren
patent: 4933639 (1990-06-01), Barker

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