Body coil decoupling circuit
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United States of America Patent
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Oct 26, 1993
Issued Date -
N/A
app pub date -
Jan 12, 1993
filing date -
Jan 30, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A system for decoupling the body coil of the magnetic resonance imaging system when surface coils are used, and especially when the surface coils are used only for receiving. Semi-conductor switches; i.e., diodes are used in the body coil to decouple the body coils. However, gradient generated transients often erroneously switch off the diodes which are then destroyed by a subsequent transmitted RF signal. The invention provides fail safe circuitry for preventing RF transmission when the diode switches are in the non-conducting condition.
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