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Method for placing a localization element in an organ of a patient for four dimensional soft tissue navigation

  • US 10,460,437 B2
  • Filed: 02/22/2013
  • Issued: 10/29/2019
  • Est. Priority Date: 02/22/2012
  • Status: Active Grant
First Claim
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1. A method comprising:

  • preparing a segmented image dataset to match the anatomy of a patient by(i) forming a gated point cloud of data by moving a first catheter having a localization element through a plurality of locations in the patient'"'"'s anatomy,(ii) using a processor to density filter the gated point cloud to reduce the number of duplicate data points in the gated point cloud,(iii) classifying data points of the density filtered gated point cloud according to anatomical points of reference,(iv) registering the classified gated point cloud to the segmented image dataset,(v) comparing the classified gated point cloud to the segmented image data set to determine the weighting of points comprised by the gated point cloud,(vi) distinguishing regions of greater weighting from regions of lesser weighting, and(vii) modifying the registered segmented image dataset to correspond to the classified data points of the gated point cloud;

    navigating a second catheter to a target tissue in an organ using the registered segmented image dataset, the target tissue having a position;

    attaching a first localization element to the target tissue to fix a position of the first localization element relative to the position of the target tissue;

    registering the first localization element to the segmented image dataset; and

    identifying the position of the first localization element from outside the patient'"'"'s organ using an electromagnetic field generator with a 3D coordinate system, wherein the the electromagnetic field generator determines the position of the first localization element and a position of a second localization element relative to the electromagnetic field generator even if the patient has been manipulated such that the first localization element is no longer registered to the segmented image dataset.

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