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Methods and systems for determining fluid content of tissue

  • US 8,989,837 B2
  • Filed: 04/14/2010
  • Issued: 03/24/2015
  • Est. Priority Date: 12/01/2009
  • Status: Active Grant
First Claim
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1. A diagnostic apparatus, comprising:

  • one or more antennas configured to be disposed on a thorax of a body of a patient so as to direct radio frequency (RF) electromagnetic waves through a lung in the body and to output signals responsively to the RF electromagnetic waves that have passed through the lung; and

    processing circuitry is configured to;

    process the signals to determine an effective RF path length of the RF electromagnetic waves,wherein the effective RF path length is defined by the length of time required for the RF electromagnetic waves to pass through at least one of the thorax to an antenna and pass through to the lung and reflect therefrom to an antenna,compare the effective RF path length to one or more stored RF path length values corresponding to identified levels of fluid content of lungs, anddetermine fluid content of the lung based on the comparison.

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