Apparatus and method for decreasing bio-effects of magnetic gradient field gradients
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United States of America Patent
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Jun 18, 2013
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Apr 21, 2011
app pub date -
Oct 15, 2010
filing date -
Jun 20, 2008
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Abstract
A magnetic field generator includes a power source and a segmented or un-segmented coil connected to the power source to generate a time-varying magnetic field. Energy is applied to the coil so that the coil generates a time-varying magnetic field gradient with a magnitude of at least 1 milliTesla per meter and a rise-time of less than 10 microseconds. The coil may be comprised of overlapping, non-overlapping or partially overlapping coil segments that may individually energized to further improve the operating characteristics of the coil to further decrease bio-effects in magnetic resonance imaging through the use of reduced pulse lengths and multi-phasic magnetic gradient pulses.
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