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Ultrasound therapy apparatus and method for operating same during MR monitoring

  • US 6,148,225 A
  • Filed: 09/25/1998
  • Issued: 11/14/2000
  • Est. Priority Date: 09/25/1997
  • Status: Expired due to Term
First Claim
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1. A method for operating an ultrasound therapy apparatus during simultaneous operation of a diagnostic magnetic resonance apparatus, said diagnostic magnetic resonance apparatus operating in a magnetic resonance apparatus frequency band, said method comprising the steps of:

  • supplying high-frequency electrical signals which are chronologically variable in frequency via a transmission amplifier to an ultrasound transducer arrangement for causing said ultrasound transducer arrangement to emit ultrasound; and

    generating said high-frequency electrical signals with respectively different discrete frequency values within an ultrasound arrangement frequency band in chronological succession, said discrete frequency values comprising whole-number multiple harmonics which are not in said magnetic resonance apparatus frequency band.

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