Vascular selection from images
Inventors
Lavi, Guy • Shilon, Ofek • SEMO, Sarit • HARISH, Omri • Shimshovitz, Asaf
Assignees
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Publication Number
US-11937963-B2
Publication Date
2024-03-26
Expiration Date
Abstract
Methods and systems for manually assisted definition of vascular features are described. In some embodiments, a method provides for editing of vascular paths by enabling a user to drag an erroneously segmented region of a selected vascular path into alignment with a more correctly segmented position that is depicted as a blood vessel in a vascular image. The method may use an energy function, defined as a function of position along the segmentation of the selected blood vessel, to determine how a vascular path is to be moved based on dragging motions provided by the user. In some instances, non-zero regions of the energy function are set based on the position of the selected region.
Core Innovation
The invention relates to defining a vascular path from vascular images by semi-automatically estimating features of a plurality of vascular segments. Individual vascular segments include a plurality of portions extending between two end points depicted in the vascular image, and for each vascular segment the system estimates individual cost assignments indicative of a preferred path of vascular flow associated with a lower cost.
Using the cost assignments, a vascular path is estimated from at least a subset of the vascular segments. An interactive user interface is then presented to display a graphical depiction of the vascular path and to support responsiveness to user input when an erroneous definition of a first vascular segment is identified.
The erroneous definition is associated with a criterion of direction, and the user input updates a determined directional path of blood flow between two end points of the first vascular segment. Based on the user input, the cost assignments are updated for the first vascular segment and for a second vascular segment included in the subset, the second vascular segment stemming from a common vascular junction as the first vascular segment.
Claims Coverage
The document includes two independent claims, a method and an apparatus, that share the same core inventive structure. The inventive features cover cost and feature estimation for vascular segments, vascular path estimation from a subset of segments, and interactive user-driven correction of direction-based segment errors with corresponding cost updates at a shared junction.
Cost-indicative vascular-segment features and lower-cost path assignment
Estimating features of a plurality of vascular segments depicted in at least one vascular image, wherein individual vascular segments comprise a plurality of portions that extend between two end points depicted in the vascular image; estimating individual cost assignments for individual vascular segments, the cost assignments being indicative of a preferred path of vascular flow which is associated with a lower cost.
Vascular path estimation from segment subset using cost assignments
Estimating a vascular path from at least a subset of the vascular segments based at least in part on the cost assignments.
Interactive user interface for direction-criterion correction of an erroneous segment
Causing an interactive user interface to be presented, wherein the interactive user interface is configured to display a graphical depiction of the vascular path, and be responsive to user input to address an erroneous definition of a first vascular segment included in the subset of vascular segments, wherein the erroneous definition is associated with a criterion of direction, and wherein the user input updates a determined directional path of blood flow between two end points of the first vascular segment.
Junction-based cost update for corrected first and second segments
Updating, based on the user input, the cost assignments for the first vascular segment and a second vascular segment included in the subset of the vascular segments, the second vascular segment stemming from a common vascular junction as the first vascular segment.
Overall, the claims cover estimating features for vascular segments, assigning per-segment costs indicative of a preferred lower-cost blood-flow path, estimating a vascular path from a subset, and using an interactive interface to correct direction-related errors and update costs for the corrected segment and an adjacent segment sharing a common junction.
Stated Advantages
Documented Applications
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