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MULTI-CHANNEL REAL-TIME PHASE MODULATION FOR EMI REDUCTION IN AN ULTRASOUND DEVICE
MULTI-CHANNEL REAL-TIME PHASE MODULATION FOR EMI REDUCTION IN AN ULTRASOUND DEVICE
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机译:超声设备中用于降低EMI的多通道实时相位调制
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摘要
Methods for reducing electromagnetic interference arising from use of multiple ultrasound transducers in an array, particularly inside a human body that is inside a magnetic resonance imaging device. Electrical signals driving the transducers are offset in phase with respect to one another so as to achieve maximum offset of electrical and magnetic fields arising from such signals and transducers. Phase offsets are dynamically adjusted to respond to changes in driving amplitudes and frequencies so as to maintain optimal reduction of electromagnetic interference.
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