Shape similarity measure for body tissue

摘要

A shape similarity metric can be provided that indicates how similar two or more shapes are. A difference between a union of the shapes and an intersection of the shapes can be used to determine the similarity metric. The shape similarity metric can provide an average distance between the shapes. Different processes for determining shapes can be evaluated for accuracy based on the shape similarity metric. New or alternative shape-determining processes can be compared for accuracy against other shape-determining processes including reference shape-determining processes. Shape similarity metrics can be determined for two-dimensional shapes and three-dimensional shapes.

主权项

1. A method of determining an accuracy of shape-determining processes for identifying shapes of a body tissue in one or more images of a patient, the method comprising:
receiving first data that defines a first boundary of a first shape of the body tissue in at least a portion of the one or more images, the first shape being determined by a first shape-determining process, wherein the one or more images are diagnostic images of the patient; receiving second data that defines a second boundary of a second shape of the body tissue in at least a portion of the one or more images, the second shape being determined by a second shape-determining process; placing the first shape and the second shape within a coordinate space; determining, by a computer system, an intersection shape of the first shape and the second shape in the coordinate space; determining, by the computer system, a union shape of the first shape and the second shape in the coordinate space; calculating, by the computer system, a difference between the union shape and the intersection shape; computing, by the computer system, a shape similarity metric based on the difference; and providing the shape similarity metric for determining an accuracy of the second shape-determining process relative to the first shape-determining process.