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Method and apparatus for invasive device tracking using organ timing signal generated from MPS sensors

  • US 9,956,049 B2
  • Filed: 02/09/2017
  • Issued: 05/01/2018
  • Est. Priority Date: 05/18/1999
  • Status: Expired due to Term
First Claim
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1. An apparatus for generating an organ timing signal relating to an organ within a body of a patient, said apparatus comprising:

  • a medical positioning system (MPS) including an electromagnetic sensor configured to be attached to an external area of the patient body, said MPS being configured to determine a three-dimensional position of said sensor and thereby the external area of the patient body by processing transmitted electromagnetic signals transmitted by the MPS with detected electromagnetic signals detected by the sensor, said MPS further generating time-tagged MPS data sets, each of said MPS data sets comprising a collection of three-dimensional position coordinate readings wherein each of the readings is associated with a respective time at which the reading was obtained, said readings demonstrating the overall motion trajectory of said sensor over time; and

    a processor coupled with said MPS, generating said organ timing signal from said MPS data sets by detecting and identifying periodic motion frequencies in said time-tagged MPS data sets, and filtering said periodic motion frequencies from said MPS data sets so as to separate out said periodic motion frequencies corresponding to said organ timing signal from said overall motion trajectory of said sensor.

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