Automated tool for vein shaving in anatomical map

A system for improving accuracy of an electro-anatomical map by automatically shaving a vein to reduce tubular-structure mapping artifacts, the system comprising:

• a memory configured to store map data comprising a point cloud of mapped data points representing a mapped volume of an anatomical structure that is substantially tubular;
• and
• a processor configured to:
• cause display, on a screen, of a first electro-anatomical map of a portion of a patient anatomy, the first electro-anatomical map comprising the mapped volume;
• at a first cross-section of the mapped volume, determine a first best-fitting ellipse based on data points associated with the first cross-section of the mapped volume, wherein the first best-fitting ellipse is non-circular such that a major axis length of the first best-fitting ellipse is different from a minor axis length of the first best-fitting ellipse;
• estimate a first point along a medial axis of the mapped volume based on a center of the first best-fitting ellipse;
• estimate a second point along the medial axis of the mapped volume at a second cross-section of the mapped volume;
• compute a generalized cylindrical volume spanning between at least the first cross-section and the second cross-section based on the medial axis;
• remove, from the point cloud of mapped data points, mapped data points that are located outside the generalized cylindrical volume, wherein removing is performed without computing an intersection line between polygonal meshes of different anatomical structures;
• and
• cause display, on the screen, of a revised electro-anatomical map based on the point cloud after removal of the mapped data points located outside the generalized cylindrical volume.

A non-transitory computer-readable medium for improving accuracy of an electro-anatomical map by automatically shaving a vein to reduce tubular-structure mapping artifacts, the non-transitory computer-readable medium having instructions stored thereon that, when executed by a processor, cause the processor to perform a method comprising:

• displaying, on a screen, a first electro anatomical map of a portion of a patient anatomy, the first electro-anatomical map comprising a mapped volume of an anatomical structure that is substantially tubular;
• at a first cross-section of the mapped volume, determining a first best-fitting ellipse based on data points associated with the first cross-section of the mapped volume, wherein the first best-fitting ellipse is non-circular such that a major axis length of the first best-fitting ellipse is different from a minor axis length of the first best-fitting ellipse;
• estimating a first point along a medial axis of the mapped volume based on a center of the first best-fitting ellipse;
• estimating a second point along the medial axis of the mapped volume at a second cross-section of the mapped volume;
• computing a generalized cylindrical volume spanning between at least the first cross-section and the second cross-section based on the medial axis;
• removing, from a point cloud of mapped data points representing the mapped volume, mapped data points that are located outside the generalized cylindrical volume, wherein removing is performed without computing an intersection line between polygonal meshes of different anatomical structures;
• and
• displaying, on the screen, a revised electro-anatomical map based on the point cloud after removal of the mapped data points located outside the generalized cylindrical volume.