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Microwave thermometry for microwave ablation systems

  • US 9,121,774 B2
  • Filed: 06/21/2013
  • Issued: 09/01/2015
  • Est. Priority Date: 06/22/2012
  • Status: Active Grant
First Claim
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1. A microwave ablation system comprising:

  • a microwave applicator including an antenna configured to deliver microwave energy to ablate tissue;

    a microwave generator coupled to the microwave applicator via a transmission network and configured to generate a microwave signal and transmit the microwave signal to the antenna;

    a radiometer configured to measure noise temperature from a signal propagating through the transmission network;

    a controller configured to turn off the microwave signal generated by the microwave generator for a predetermined period and to control the radiometer to measure noise temperature during the predetermined period;

    a first thermocouple configured to measure a first temperature; and

    a second thermocouple configured to measure a second temperature,wherein the controller identifies the noise temperature measured by the radiometer as a noise temperature of tissue based on the first temperature and the second temperature.

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