DEFORMABLE TREE MATCHING WITH TANGENT-ENHANCED COHERENT POINT DRIFT

摘要

Deformable, anatomical trees represented by scan data from different times are matched. Coherent point drift (CPD) solved using expectation maximization is enhanced with tangent or other curve information. By including point-curve information, another characteristic than GMM-based probabilities are included in the cost function for matching. The angle information provided by the tangent, normal, or other point-curve measure may more likely match points in one set representing a tree to points in another set representing the tree.

主权项

1. A method for matching deformable, anatomical trees represented by scan data, the method comprising:
acquiring, from a medical imaging system, the scan data representing a tree structure of a patient at first and second times; calculating, by a processor, tangents along the tree structure at the first time and at the second time from the scan data; matching, by the processor, the tree structure at the first time with the tree structure at the second time, the matching being performed with coherent point drift where the tangents are included as part of a cost function of the coherent point drift; and outputting, by the processor, an image representing the matched tree structure from the first and second times.