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Method and system for determining information of extrema during expansion and contraction cycles of an object

  • US 8,827,934 B2
  • Filed: 11/15/2011
  • Issued: 09/09/2014
  • Est. Priority Date: 05/13/2011
  • Status: Active Grant
First Claim
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1. A method for determining information of extrema during expansion and contraction cycles of an object, the method comprising:

  • receiving time sampled information from a plurality of sensors distributed along a length of a flexible device so as to indicate the shape of the flexible device over time while the flexible device extends through a lumen of the object so as to conform to and resemble the shape of the lumen;

    determining displacements over time of a selected point at a selected insertion length of the flexible device into the lumen of the object relative to a reference point using the time sampled information received from the plurality of sensors;

    determining extrema time points during the expansion and contraction cycles of the object by identifying sign changes of the slope of the determined displacements of the point of the lumen over time; and

    identifying extrema types during the expansion and contraction cycles of the object by using extrema type characteristics.

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