Systems and methods for estimating ischemia and blood flow characteristics from vessel geometry and physiology
First Claim
1. A method for determining individual-specific blood flow characteristics, the method comprising:
- acquiring, by a processor, for each of a plurality of individuals, individual-specific anatomic data, one or more physiological parameters of the respective individual, and one or more non-invasively computed blood flow characteristics of blood flow through at least part of each respective individual'"'"'s vascular system;
for each of a plurality of points in the individual-specific anatomic data of each of the plurality of individuals, creating, by the processor, a feature vector comprising a vascular cross-sectional area, a diseased length, and one or more boundary conditions of a geometric model at the respective point;
forming, by the processor, associations of each created feature vector with a non-invasively computed blood flow characteristic of blood flow through the part of the respective individual'"'"'s vascular system at the respective point of the feature vector;
training a machine learning algorithm comprising one or more of a support vector machine (SVM), a multi-layer perceptron (MLP), a multivariate regression (MVR), and a weighted linear or logistic regression on the associated feature vectors and non-invasively computed blood flow characteristics of the plurality of points of the plurality of individuals'"'"' vascular systems, wherein the training of the machine learning algorithm comprises operations performed by the processor to generate feature weights between each individual'"'"'s individual-specific anatomic data and the individual'"'"'s non-invasively computed blood flow characteristics;
acquiring, by the processor, for a patient, patient-specific anatomic data of at least part of the patient'"'"'s vascular system and one or more physiological parameters of the patient; and
for at least one point in the patient'"'"'s patient-specific anatomic data, estimating, by the processor, one or more values of the blood flow characteristic at one or more points of the patient'"'"'s vascular system, using the trained machine learning algorithm and the generated feature weights.
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Abstract
Systems and methods are disclosed for determining individual-specific blood flow characteristics. One method includes acquiring, for each of a plurality of individuals, individual-specific anatomic data and blood flow characteristics of at least part of the individual'"'"'s vascular system; executing a machine learning algorithm on the individual-specific anatomic data and blood flow characteristics for each of the plurality of individuals; relating, based on the executed machine learning algorithm, each individual'"'"'s individual-specific anatomic data to functional estimates of blood flow characteristics; acquiring, for an individual and individual-specific anatomic data of at least part of the individual'"'"'s vascular system; and for at least one point in the individual'"'"'s individual-specific anatomic data, determining a blood flow characteristic of the individual, using relations from the step of relating individual-specific anatomic data to functional estimates of blood flow characteristics.
28 Citations
24 Claims
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1. A method for determining individual-specific blood flow characteristics, the method comprising:
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acquiring, by a processor, for each of a plurality of individuals, individual-specific anatomic data, one or more physiological parameters of the respective individual, and one or more non-invasively computed blood flow characteristics of blood flow through at least part of each respective individual'"'"'s vascular system; for each of a plurality of points in the individual-specific anatomic data of each of the plurality of individuals, creating, by the processor, a feature vector comprising a vascular cross-sectional area, a diseased length, and one or more boundary conditions of a geometric model at the respective point; forming, by the processor, associations of each created feature vector with a non-invasively computed blood flow characteristic of blood flow through the part of the respective individual'"'"'s vascular system at the respective point of the feature vector; training a machine learning algorithm comprising one or more of a support vector machine (SVM), a multi-layer perceptron (MLP), a multivariate regression (MVR), and a weighted linear or logistic regression on the associated feature vectors and non-invasively computed blood flow characteristics of the plurality of points of the plurality of individuals'"'"' vascular systems, wherein the training of the machine learning algorithm comprises operations performed by the processor to generate feature weights between each individual'"'"'s individual-specific anatomic data and the individual'"'"'s non-invasively computed blood flow characteristics; acquiring, by the processor, for a patient, patient-specific anatomic data of at least part of the patient'"'"'s vascular system and one or more physiological parameters of the patient; and for at least one point in the patient'"'"'s patient-specific anatomic data, estimating, by the processor, one or more values of the blood flow characteristic at one or more points of the patient'"'"'s vascular system, using the trained machine learning algorithm and the generated feature weights. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system for determining individual-specific blood flow characteristics, the system comprising:
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a data storage device storing instructions for estimating individual-specific blood flow characteristics; and a processor configured to execute the instructions to perform a method including the steps of; acquiring, for each of a plurality of individuals, individual-specific anatomic data, one or more physiological parameters of the respective individual, and one or more non-invasively computed blood flow characteristics of blood flow through at least part of each respective individual'"'"'s vascular system; for each of a plurality of points in the individual-specific anatomic data of each of the plurality of individuals, creating a feature vector comprising a vascular cross-sectional area, a diseased length, and one or more boundary conditions of a geometric model at the respective point; forming associations of each created feature vector with a non-invasively computed blood flow characteristic of blood flow through the part of the respective individual'"'"'s vascular system at the respective point of the feature vector; training a machine learning algorithm comprising one or more of a support vector machine (SVM), a multi-layer perceptron (MLP), a multivariate regression (MVR), and a weighted linear or logistic regression on the associated feature vectors and non-invasively computed blood flow characteristics of the plurality of points of the plurality of individuals'"'"' vascular systems, wherein the training of the machine learning algorithm comprises operations performed by a processor to generate feature weights between each individual'"'"'s individual-specific anatomic data and the individual'"'"'s non-invasively computed blood flow characteristics; acquiring, for a patient, patient-specific anatomic data of at least part of the patient'"'"'s vascular system and one or more physiological parameters of the patient; and for at least one point in the patient'"'"'s patient-specific anatomic data, estimating one or more values of the blood flow characteristic at one or more points of the patient'"'"'s vascular system, using the trained machine learning algorithm and the generated feature weights. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A non-transitory computer-readable medium storing instructions that, when executed by a computer, cause the computer to perform a method including:
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acquiring, for each of a plurality of individuals, individual-specific anatomic data, one or more physiological parameters of the respective individual, and one or more non-invasively computed blood flow characteristics of blood flow through at least part of each respective individual'"'"'s vascular system; for each of a plurality of points in the individual-specific anatomic data of each of the plurality of individuals, creating a feature vector comprising a vascular cross-sectional area, a diseased length, and one or more boundary conditions of a geometric model at the respective point; forming associations of each created feature vector with a non-invasively computed blood flow characteristic of blood flow through the part of the respective individual'"'"'s vascular system at the respective point of the feature vector; training a machine learning algorithm comprising one or more of a support vector machine (SVM), a multi-layer perceptron (MLP), a multivariate regression (MVR), and a weighted linear or logistic regression on the associated feature vectors and non-invasively computed blood flow characteristics of the plurality of points of the plurality of individuals'"'"' vascular systems, wherein the training of the machine learning algorithm comprises operations performed by a processor to generate feature weights between each individual'"'"'s individual-specific anatomic data and the individual'"'"'s non-invasively computed blood flow characteristics; acquiring, for a patient, patient-specific anatomic data of at least part of the patient'"'"'s vascular system and one or more physiological parameters of the patient; and for at least one point in the patient'"'"'s patient-specific anatomic data, estimating one or more values of the blood flow characteristic at one or more points of the patient'"'"'s vascular system, using the trained machine learning algorithm and the generated feature weights. - View Dependent Claims (23, 24)
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Specification