Comput Methods Programs Biomed - A fast seed detection using local geometrical feature for automatic tracking of coronary arteries in CTA.

Tópicos

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Resumo

We propose a fast seed detection for automatic tracking of coronary arteries in coronary computed tomographic angiography (CCTA). To detect vessel regions, Hessian-based filtering is combined with a new local geometric feature that is based on the similarity of the consecutive cross-sections perpendicular to the vessel direction. It is in turn founded on the prior knowledge that a vessel segment is shaped like a cylinder in axial slices. To improve computational efficiency, an axial slice, which contains part of three main coronary arteries, is selected and regions of interest (ROIs) are extracted in the slice. Only for the voxels belonging to the ROIs, the proposed geometric feature is calculated. With the seed points, which are the centroids of the detected vessel regions, and their vessel directions, vessel tracking method can be used for artery extraction. Here a particle filtering-based tracking algorithm is tested. Using 19 clinical CCTA datasets, it is demonstrated that the proposed method detects seed points and can be used for full automatic coronary artery extraction. ROC (receiver operating characteristic) curve analysis shows the advantages of the proposed method.

Resumo Limpo

propos fast seed detect automat track coronari arteri coronari comput tomograph angiographi ccta detect vessel region hessianbas filter combin new local geometr featur base similar consecut crosssect perpendicular vessel direct turn found prior knowledg vessel segment shape like cylind axial slice improv comput effici axial slice contain part three main coronari arteri select region interest roi extract slice voxel belong roi propos geometr featur calcul seed point centroid detect vessel region vessel direct vessel track method can use arteri extract particl filteringbas track algorithm test use clinic ccta dataset demonstr propos method detect seed point can use full automat coronari arteri extract roc receiv oper characterist curv analysi show advantag propos method

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