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Ultrasound intensity determining method and apparatus

  • US 5,873,902 A
  • Filed: 07/15/1997
  • Issued: 02/23/1999
  • Est. Priority Date: 03/31/1995
  • Status: Expired due to Fees
First Claim
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1. A method of determining the ultrasound attenuation coefficient of tissue comprising the steps of providing an ultrasound field intensity measuring transducer sized for insertion into the vicinity of a treatment site, providing an ultrasound field generating transducer, determining the free field intensity created by the generating transducer in response to various generating transducer exciting signal levels, determining the measuring transducer output in the free field in response to various generating transducer exciting signal levels, inserting the measuring transducer into the vicinity of the treatment site, positioning the generating transducer to create an ultrasound field at the treatment site, determining the distance from the generating transducer to the measuring transducer, applying an exciting signal to the generating transducer, determining the measuring transducer output, and determining the attenuation coefficient of the tissues between the generating transducer and the measuring transducer.

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