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Method and system for analyzing cardiovascular sounds

  • US 7,517,319 B2
  • Filed: 06/01/2004
  • Issued: 04/14/2009
  • Est. Priority Date: 06/02/2003
  • Status: Expired due to Fees
First Claim
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1. A system for analyzing sounds originating in at least a portion of an individual'"'"'s cardiovascular system comprising:

  • (One) N transducers, where N is an integer, each transducer configured to be fixed on a surface of the individual over the thorax, the ith transducer being fixed at a location xi and generating an initial signal P(xi,t) indicative of pressure waves at the location xi, for i=1 to N; and

    (Two) a processor configured to receive the signals P(xi,t) and to filter the signals P(xi,t) so as to generate filtered signals in which at least one component of the signals P(xi,t) not arising from cardiovascular sounds has been removedwherein respiratory tract sounds have been removed, andwherein the processor is further configured to determine an average acoustic energy {tilde over (P)} (x,t1,t2) arising from the cardiovascular system at at least one position x over a time interval from a first time t1 to a second time t2, {tilde over (P)} being determined in an algorithm involving at least one of the processed signals,wherein the function {tilde over (P)} is determined at one or more locations x in an algorithm comprising;

    (One) determining an average acoustic energy {tilde over (P)} (xi,t1,t2) over a time interval from t1 to t2 at a plurality of locations xi of transducers; and

    (Two) determining an average acoustic energy {tilde over (P)} (x,t1, t2) at at least one location x by interpolation of the determined {tilde over (P)} (xi,t1, t2).

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