Magnetic resonance imaging system with a class-E radio frequency amplifier having a feedback circuit
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United States of America Patent
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Jul 8, 2008
Grant Date -
N/A
app pub date -
Jul 10, 2007
filing date -
Feb 23, 2007
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A Class-E amplifier has been adapted for use in the radio frequency section that drives a transmit coil of a magnetic resonance imaging (MRI) system. The Class-E amplifier responds to a radio frequency carrier signal and a control signal by producing a radio frequency excitation signal for driving the transmit coil. The Class-E amplifier includes a pickup coil that senses a signal emitted from the transmit coil and produces a feedback signal that is used to alter the control signal and thereby control production of the radio frequency excitation signal.
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