SHAPE BASED SIMILARITY OF CONTINUOUS WAVE DOPPLER IMAGES
First Claim
1. A method comprising:
- storing in a database at least one continuous wave (CW) Doppler image and at least one characteristic associated with each of the at least one stored Doppler image in a form of an envelope curve;
gathering, by a processor, a query Doppler image, and extracting the envelope curve from a velocity profile associated with a query image;
matching, by the processor, the at least one characteristic associated with said at least one stored image with at least one characteristic associated with the envelope curve extracted from the query image; and
retrieving, by the processor, from the database at least one image having characteristics matching the characteristics associated with the query image.
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Accused Products
Abstract
Continuous wave Doppler images in a data base comprising cardiac echo studies are processed to separate Doppler frames. The frames are pre-processed to extract envelope curves and their corner shape features. Shape patterns in Doppler images from echo studies of patients with known cardiac (valvular) diseases are employed to infer the similarity in valvular disease labels for purposes of automated clinical decision support. Specifically, similarity in appearance of Doppler images from the same disease class is modeled as a constrained non-rigid translation transform of velocity envelopes embedded in these images. Shape similarity between two Doppler images is then judged by recovering the alignment transform using a variant of dynamic shape warping. Since different diseases appear as characteristic shape patterns in Doppler images, measuring the similarity in the shape pattern conveyed within the velocity region of two Doppler images can infer the similarity in their diagnosis labels.
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Citations
18 Claims
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1. A method comprising:
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storing in a database at least one continuous wave (CW) Doppler image and at least one characteristic associated with each of the at least one stored Doppler image in a form of an envelope curve; gathering, by a processor, a query Doppler image, and extracting the envelope curve from a velocity profile associated with a query image; matching, by the processor, the at least one characteristic associated with said at least one stored image with at least one characteristic associated with the envelope curve extracted from the query image; and retrieving, by the processor, from the database at least one image having characteristics matching the characteristics associated with the query image. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A system comprising:
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a database to store at least one continuous wave (CW) Doppler image and at least one characteristic associated with each of the at least one stored Doppler image in a form of an envelope curve; a query manager to gather a query Doppler image and to extract the envelope curve from a velocity profile associated with the query image; an image manager to match the at least one characteristic associated with the stored image with at least one characteristic associated with the envelope curve extracted by the query manager from the query image; and a retrieval manager in communication with the image manager, the retrieval manager to retrieve from the database at least one image having a characteristic matching the characteristic associated with the query image. - View Dependent Claims (8, 9, 10, 11, 12)
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13. An article comprising:
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a computer readable data storage media, said media including instructions comprising; instructions for storing in a database at least one continuous wave (CW) Doppler image and at least one characteristic associated with each of the at least one stored Doppler image in a form of an envelope curve; instructions for gathering, by a processor, a query Doppler image, and extracting the envelope curve from a velocity profile associated with the query image; instructions for matching, by the processor, the at least one characteristic associated with the stored image with at least one characteristic associated with the envelope curve extracted from the query image; and instructions for retrieving, by the processor, from the database at least one image having characteristics matching the characteristic associated with the query image. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification