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Abstract #4198

Control of Gradient Output for Limiting AIMD Gradient Induced Device Heating

Michael Childers1 and Shiloh Sison2

1Abbott, Sylmar, CA, United States, 2Abbott, Sunnyvale, CA, United States

Control of imaging gradient |dB/dt| rms is desired to limit potential gradient induced heating of medical implants. Current controls for |dB/dt| rms have been implemented on a per sequence basis. In this abstract we show that controlling gradient |dB/dt| rms on a per sequence basis may be overly conservative for certain examinations containing sequences with transient durations of high |dB/dt| rms. As such there is the potential to unnecessarily restrict clinical sequences with acceptable device heating. Alternative means for controlling |dB/dt| rms, such as calculating |dB/dt| rms using a rolling average across sequences, should therefore be considered.

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