Q control for capacitively coupled MRI/MRSI RF coil

Details Q control for capacitively coupled MRI/MRSI RF coil Q control for capacitively coupled MRI/MRSI RF coil

1990-09-18

1992-12-15

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

324318, G01R 3320

Patent

active

051720612

ABSTRACT:
The effective Q of a capacitively coupled RF coil in a magnetic resonance imaging (or magnetic resonance spectroscopic imaging) system is controllably lowered from its intrinsic maximum value by controlling the impedance reflected across the coil via a tuning/matching network associated and located with the coil. The Q may be advantageously lowered during transmit time as compared with receive times (during which the Q may be relatively increased) by effecting controlled impedance mismatches within the RF feed network used to supply RF signals to/from the RF coil.

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