초록 ▼

An apparatus and method for identifying and classifying objects represented in CT data for a region using the shape of the objects are disclosed. An object represented by CT data for a region is identified. Next, a two-dimensional projection of the object along a principal axis of the object is gene

An apparatus and method for identifying and classifying objects represented in CT data for a region using the shape of the objects are disclosed. An object represented by CT data for a region is identified. Next, a two-dimensional projection of the object along a principal axis of the object is generated. The principal axis can be identified by computing eigenvectors of a covariance matrix of spatial locations of voxels in the CT data that are associated with the object. The smallest eigenvector can be selected as the principal axis of the object along which the two-dimensional projection is generated. The identification of the object can be used in the classification of the object such as by altering one or more discrimination parameters.

대표청구항 ▼

1. A method of detecting objects represented in three-dimensional reconstructed computed tomography (CT) data acquired within a three-dimensional region defined by a three-dimensional scanning coordinate system, comprising:identifying object volume elements from the volume elements of the three-dime

1. A method of detecting objects represented in three-dimensional reconstructed computed tomography (CT) data acquired within a three-dimensional region defined by a three-dimensional scanning coordinate system, comprising:identifying object volume elements from the volume elements of the three-dimensional reconstructed CT data so as to define volume elements constituting an entire object; identifying three axes defined by eigenvectors associated with the entire object; and generating a two-dimensional projection from three-dimensional reconstructed CT data of the entire object in a plane associated with one of the three axes defined by the eigenvectors associated with the entire object; wherein the plane in which the two-dimensional projection is generated is a plane in which the two-dimensional projection has maximum area; wherein the plane in which the two-dimensional projection has maximum area is identified by searching solid angles over a hemisphere in the three-dimensional region defined by the three-dimensional scanning coordinate system.