METHOD AND SYSTEM FOR IMAGE PROCESSING TO DETERMINE PATIENT-SPECIFIC BLOOD FLOW CHARACTERISTICS
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Abstract
Embodiments include a system for determining cardiovascular information for a patient. The system may include at least one computer system configured to receive patient-specific data regarding a geometry of the patient'"'"'s heart, and create a three-dimensional model representing at least a portion of the patient'"'"'s heart based on the patient-specific data. The at least one computer system may be further configured to create a physics-based model relating to a blood flow characteristic of the patient'"'"'s heart and determine a fractional flow reserve within the patient'"'"'s heart based on the three-dimensional model and the physics-based model.
27 Citations
198 Claims
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1-184. -184. (canceled)
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185. A method of image processing to determine a blood flow characteristic, comprising:
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estimating an outlet flow rate of a stenosis based on a cross-sectional metric at an outlet of the stenosis, a cross-sectional metric at an inlet of the stenosis, and a flow rate at the inlet of the stenosis; estimating a resistance of the stenosis based on aortic blood pressure at the inlet of the stenosis, the outlet flow rate, and a computational fluid dynamics simulation; classifying an unknown fractional flow reserve (“
FFR”
) metric for a cardiac vessel with the stenosis as one of a plurality of different pre-defined classes based on extracted features and a learning model, wherein the extracted features include one or more estimated boundary conditions of the stenosis, including at least one of the estimated outlet flow rate or the estimated outlet resistance of the stenosis; andgenerating a signal indicative of the classification. - View Dependent Claims (186, 187, 188, 189, 190, 191, 192, 193, 194)
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195. A system for image processing to determine a blood flow characteristic, comprising:
a data analyzer configured to determine a fractional flow reserve (“
FFR”
) classification of an unknown FFR for a stenosis, the data analyzer, including;a boundary condition estimator configured to estimate at least one boundary condition of a stenosis of a vessel, including at least one of an estimated outlet flow rate of the stenosis or an estimated outlet resistance of the stenosis, based on image data that includes a representation of the vessel and the stenosis, wherein the boundary condition estimator estimated an outlet flow rate of the stenosis as a function of a cross-sectional metric at an outlet of the stenosis, a cross-sectional metric at an inlet of the stenosis, and a flow rate at the inlet of the stenosis, and the boundary condition estimator estimates a resistance of the stenosis based on aortic blood pressure at the inlet of the stenosis and the outlet flow rate using an iterative algorithm; a feature extractor configured to extract one or more features from at least one of segmented tissue of interest in image data representing the stenosis and corresponding vessel, the estimated boundary conditions of the stenosis, and intensity information from the image data or subject data; and a classifier configured to classify the unknown FFR into one of a plurality of different pre-defined classes based on the extracted features, including the estimated outlet flow rate of the stenosis and the estimated outlet resistance of the stenosis extracted features and a learning model. - View Dependent Claims (196, 197, 198)
Specification