US 2012/0071755 A1 · Method and System for Automatic Native and Bypass Coronary Ostia Detection in Cardiac Computed Tomography Volumes

Abstract

A method and system for detection of native and bypass coronary ostia in a 3D volume, such as a CT volume, is disclosed. Native coronary ostia are detected by detecting a bounding box defining locations of a left native coronary ostium and a right native coronary ostium in the 3D volume using marginal space learning (MSL), and locally refining the locations of the left native coronary ostium and the right native coronary ostium using a trained native coronary ostium detector. Bypass coronary ostia are detected by segmenting an ascending aorta surface mesh in the 3D volume, generating a search region of a plurality of mesh points on the ascending aorta surface mesh based on a distribution of annotated bypass coronary ostia in a plurality of training volumes, and detecting the bypass coronary ostia by searching the plurality of mesh points in the search region.

Claims55

Dependent claims

A method for detecting coronary ostia in a 3D volume, comprising:

detecting a bounding box defining locations of a left native coronary ostium and a right native coronary ostium in the 3D volume using marginal space teaming (MSL);
and
locally refining the location of each of the left native coronary ostium and the right native coronary ostium using a trained native coronary ostium detector.

An apparatus for detecting one or more bypass coronary ostia in a 3D volume comprising:

means for segmenting an ascending aorta surface mesh in the 3D volume;
means for generating a search region comprising a plurality of mesh points of the ascending aorta surface mesh based on a distribution of annotated bypass coronary ostia in a plurality of training volumes;
and
means for detecting the one or more bypass coronary ostia by searching the plurality of mesh points in the search region.

1 more element

A non-transitory computer readable medium encoded with computer executable instructions for detecting coronary ostia in a 3D volume, the computer executable instructions defining steps comprising:

detecting a bounding box defining locations of a left native coronary ostium and a right native coronary ostium in the 3D volume using marginal space learning (MSL);
and
locally refining the location of each of the left native coronary ostium and the right native coronary ostium using a trained native coronary ostium detector.

A non-transitory computer readable medium encoded with computer executable instructions for detecting one or more bypass coronary ostia in a 3D volume, the computer executable instructions defining steps comprising:

segmenting an ascending aorta surface mesh in the 3D volume;
generating a search region comprising a plurality of mesh points of the ascending aorta surface mesh based on a distribution of annotated bypass coronary ostia in a plurality of training volumes;
and
detecting the one or more bypass coronary ostia by searching the plurality of mesh points in the search region.

1 more element

Dependencies are inferred from the claim text.

Method and System for Automatic Native and Bypass Coronary Ostia Detection in Cardiac Computed Tomography Volumes

Life of this patent

Method and System for Automatic Native and Bypass Coronary Ostia Detection in Cardiac Computed Tomography Volumes

Life of this patent

Abstract

Claims55