Viewpoint recognition in computer tomography images
First Claim
1. A system for computed tomography (CT) viewpoint recognition in CT images comprising:
- a feature engine comprising a global binary pattern feature calculation unit and at least one image feature calculation unit, said global binary pattern feature calculation unit;
(i) preprocessing said CT images with histogram equalization to maximize contrast in one or more pre-determined regions, (ii) extracting connected components from said preprocessed CT images, and (iii) forming a feature vector based on said extracted connected components;
a cognitive engine comprising;
(i) a plurality of classifiers, one for each of said global binary calculation unit, and (ii) at least one image feature calculation unit; and
a voting unit picking a class label for each of the CT images based on a majority voting scheme determining the most frequently returned label among said classifiers.
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Accused Products
Abstract
A solution is presented for cardiac CT viewpoint recognition to identify the desired images for a specific view and subsequent processing and anatomy recognition. A new set of features is presented to describe the global binary pattern of cardiac CT images characterized by the highly attenuating components of the anatomy in the image. Five classic image texture and edge feature sets are used to devise a classification approach based on SVM classification, class likelihood estimation, and majority voting, to classify 2D cardiac CT images into one of six viewpoint categories that include axial, sagittal, coronal, two chamber, four chamber, and short axis views. Such an approach results in an accuracy of 99.4% in correct labeling of the viewpoints.
24 Citations
24 Claims
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1. A system for computed tomography (CT) viewpoint recognition in CT images comprising:
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a feature engine comprising a global binary pattern feature calculation unit and at least one image feature calculation unit, said global binary pattern feature calculation unit;
(i) preprocessing said CT images with histogram equalization to maximize contrast in one or more pre-determined regions, (ii) extracting connected components from said preprocessed CT images, and (iii) forming a feature vector based on said extracted connected components;a cognitive engine comprising;
(i) a plurality of classifiers, one for each of said global binary calculation unit, and (ii) at least one image feature calculation unit; anda voting unit picking a class label for each of the CT images based on a majority voting scheme determining the most frequently returned label among said classifiers. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for computed tomography (CT) viewpoint recognition in CT images comprising:
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a feature engine comprising; one or more image feature calculation units selected from a group consisting of;
a statistical image texture feature calculation unit, a curvelet feature calculation unit, a wavelet feature calculation unit, an edge histogram features calculation unit, and a local binary pattern (LBP) features calculation unit; anda global binary pattern feature calculation unit;
(i) preprocessing said CT images with histogram equalization to maximize contrast in one or more pre-determined regions, (ii) extracting connected components from said preprocessed CT images, and (iii) forming a feature vector based on said extracted connected components;a cognitive engine comprising a plurality of classifiers, (i) one for each of said global binary calculation unit, and (ii) one for each of said image feature calculation units; and a voting unit picking a class label for each of the CT images based on a majority voting scheme determining the most frequently returned label among said classifiers. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method for computed tomography (CT) viewpoint recognition in CT images comprising:
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preprocessing said CT images with histogram equalization to maximize contrast in one or more pre-determined regions; extracting connected components from said preprocessed CT images; forming a feature vector based on said extracted connected components; applying a plurality of classifiers, (i) one for said feature vector formed from extracted connected components, and (ii) at least one additional classifier for a calculated image feature; and picking a class label for each of the CT images based on a majority voting scheme determining the most frequently returned label among said classifiers. - View Dependent Claims (16, 17, 18, 19, 20)
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21. A method for use with a 3-D computed tomography (CT) image of anatomy relevant to a medical condition, the method comprising:
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generating a binary image of the CT image, said binary image delineating bone from soft tissue; analyzing said binary image with a machine learning component to train a classifier within said machine learning component and generating a taxonomy related to anatomical viewpoints of the CT image; ranking a plurality of 2-D slices of the CT image based on said generated taxonomy; and selecting a 2-D slice among said plurality of 2-D slices that is most relevant to the medical condition based on said ranking. - View Dependent Claims (22, 23, 24)
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Specification