RF pulse control system for a magnetic resonance imaging transmi

Details RF pulse control system for a magnetic resonance imaging transmi RF pulse control system for a magnetic resonance imaging transmi

1987-01-21

1988-04-19

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

324309, G01R 3320

Patent

active

047392681

ABSTRACT:
A pulse control system for a magnetic resonance imaging transmitter has circuitry for detecting the peak value of the RF current in the transmitter coil for a given RF pulse; circuitry for comparing the detected peak value of the RF current with a desired reference peak value for the RF pulse, for determining the difference between the detected and the desired peak values for the RF pulse, and for determining a gain adjustment factor for the transmitter amplifier for the transmitter necessary to produce the desired peak value of the RF current in the transmitter coil; and circuitry for adjusting the gain of the transmitter amplifier in response to the gain adjustment factor to produce the desired peak value of the RF current for the RF pulse.

REFERENCES:
patent: 4331928 (1982-05-01), Heidt
patent: 4563775 (1986-01-01), Yokosuka
patent: 4665364 (1987-05-01), Hanawa

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