Active contour model using two-dimensional gradient vector for organ boundary detection
AssigneeVerathon Inc.
InventorsJoon Hwan Choi, Fuxing Yang
Life of this patent
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Abstract
A method for determining a contour of an organ in an ultrasound image is performed by a processor in a base unit. The method includes detecting an organ within the ultrasound image; obtaining a centroid position for the organ; extending a set of radial lines from the centroid position beyond an expected organ boundary; determining cost values at candidate nodes on each radial line, of the set of radial lines, by applying costs along gradient vectors that are normal to a contour between adjacent nodes on different radial lines; and selecting a final organ boundary contour based on a cost function analysis of paths through the candidate nodes.
Claims20
A method for determining a contour of an organ in an ultrasound image, the method comprising:
- detecting an organ within the ultrasound image;
- identifying a centroid location for the organ;
- extending, by a processor of a base unit, a set of radial lines from the centroid location beyond an expected organ boundary;
- calculating, by the processor, cost values at candidate nodes on each radial line, of the set of radial lines, using features that are calculated in a direction along vectors that are perpendicular to projected contour lines between adjacent nodes on different radial lines of the set of radial lines, wherein the cost values include a summation of internal and external energies;
- and
- selecting, by the processor, a final organ boundary contour based on a cost function analysis of paths through the candidate nodes.
A device, comprising:
- a communication interface for receiving an ultrasound image;
- a memory device for storing instructions;
- and
- a processor configured to execute the instructions to:
- detect an organ within the ultrasound image,
- obtain a centroid position for the organ,
- extend a set of radial lines from the centroid position beyond an expected organ boundary,
- determine cost values at candidate nodes on each radial line, of the set of radial lines, using features that are calculated in a direction along vectors that are perpendicular to projected contour lines between adjacent nodes on different radial lines of the set of radial lines, wherein the cost values include a summation of internal and external energies, and
- select a final organ boundary contour based on a cost function analysis of paths through the candidate nodes.
A non-transitory computer-readable medium containing instructions executable by at least one processor, the computer-readable medium comprising one or more instructions to:
- detect an organ cavity within an ultrasound image,
- obtain a centroid position for the cavity;
- extend a set of radial lines from the centroid position beyond an expected cavity-tissue interface;
- determine cost values at candidate nodes on each radial line, of the set of radial lines, using features that are calculated in a direction along vectors that are perpendicular to projected contour lines between adjacent nodes on different radial lines of the set of radial lines, wherein the cost values include a summation of internal and external energies;
- and
- select a final organ boundary contour based on a cost function analysis of paths through the candidate nodes.
Dependencies are inferred from the claim text.