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US 2017/0364658 A1Published application
Vascular flow assessment
AssigneeCathWorks Ltd.
InventorsIfat Lavi, Ran Kornowski, Idit Avrahami, Nessi Benishti, Guy Lavi
Life of this patent
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Abstract
A method for vascular assessment is disclosed. The method includes receiving a plurality of medical images of a portion of a vasculature of a subject and processing the medical images to produce a model of the vasculature. The method further includes obtaining a flow characteristic of the model and calculating an index indicative of vascular function, based, at least in part, on the flow characteristic in the model.
Claims22
A vascular assessment apparatus comprising:
- a processor communicatively coupled to a medical imaging device;
- and
- a memory storing non-transitory computer-readable instructions, which when executed, cause the processor to:
- receive a medical image from the medical imaging device, the medical image including a representation of a coronary vessel tree of a subject,
- determine diameters of blood vessels of the coronary vessel tree from to the representation of the coronary vessel tree,
- determine values of flow resistance for locations along the blood vessels of the representation of the coronary vessel tree based on the determined diameters,
- determine a first blood flow characteristic at the locations along the blood vessels,
- at a selected location along a selected one of the blood vessels in the representation of the coronary vessel tree, determine a revascularization diameter by increasing the diameter of the selected blood vessel at the selected location,
- determine a new value of flow resistance at the selected location having the revascularization diameter,
- determine a second blood flow characteristic at the locations along the blood vessels using the new value of flow resistance at the selected location,
- determine fractional flow reserve values for the locations along the blood vessels as a ratio of the first blood flow characteristic to the second blood flow characteristic for the locations along the blood vessels, and
- display the fractional flow reserve values in relation to the representation of the coronary vessel.
9 more elements
A vascular assessment apparatus storing non-transitory computer-readable instructions, which when executed, cause the apparatus to:
- access medical data stored in a database, the medical data including data including a representation of a coronary vessel tree of a subject;
- determine, from the medical data, at least one of (i) diameters, and (ii) cross-sectional areas of blood vessels of the coronary vessel tree;
- determine values of flow resistance for locations along the blood vessels of the representation of the coronary vessel tree;
- determine a first blood flow characteristic at the locations along the blood vessels using the values of flow resistance;
- identify a blood vessel constriction at an identified location among the locations along the blood vessels;
- determine at least one of a revascularization diameter and a revascularization cross-sectional area at the identified location by removing the blood vessel constriction provided in the representation of the coronary vessel tree;
- determine a new value of flow resistance at the identified location having the at least one of the revascularization diameter and the revascularization cross-sectional area;
- determine a second blood flow characteristic at the locations along the blood vessels using the new value of flow resistance at the identified location;
- determine fractional flow reserve values for the locations along the blood vessels as a relation of the first blood flow characteristic compared to the second blood flow characteristic for the locations along the blood vessels;
- and
- display the fractional flow reserve values in association with the representation of a coronary vessel tree.
8 more elements
Dependencies are inferred from the claim text.