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Analysis of real time backscatter data for fault signal generation in a medical HIFU device

  • US 9,816,968 B2
  • Filed: 03/23/2010
  • Issued: 11/14/2017
  • Est. Priority Date: 03/23/2009
  • Status: Active Grant
First Claim
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1. A method for detecting a transducer fault in a high intensity focused ultrasound therapy system, the method comprising:

  • transmitting a burst of ultrasonic energy or a pulse of ultrasonic energy from a high intensity focused ultrasound transducer mounted in a therapy head;

    after the burst of ultrasonic energy or the pulse of ultrasonic energy is transmitted, applying an electrical clamp to the transducer that provides an impedance across the transducer and accelerates vibration dampening of the transducer after the burst of ultrasonic energy or the pulse of ultrasonic energy;

    after the application of the electrical clamp ends, measuring a clamp waveform comprising residual electrical voltage;

    comparing the clamp waveform against a stored clamp waveform profile; and

    if the clamp waveform does not substantially match the stored clamp waveform profile, generating a fault signal.

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