Method and system for monitoring cardiac function of a patient during a magnetic resonance imaging (MRI) procedure
First Claim
1. A method for monitoring cardiac function of a patient during a magnetic resonance imaging (MRI) procedure, comprising:
- acquiring an MR image sequence of the patient'"'"'s heart during a cardiac phase;
segmenting a left ventricle of the patient'"'"'s heart in the MR image sequence, wherein the segmentation produces endocardial and epicardial contours;
representing at least one of the contours in polar or radial coordinates and computing its Fourier transform, wherein the Fourier transform produces Fourier descriptors for the contour;
putting a vector of the Fourier descriptors into a classifier, wherein the classifier determines whether the contour reflects normal wall motion in the cardiac phase or whether the contour reflects abnormal wall motion in the cardiac phase, wherein a contour rejected by the classifier using an unconditional, predictive probability of the contour'"'"'s observation vector as a confidence measure is interpreted as a pathological change in the left ventricle'"'"'s myocardial wall motion, wherein contours reflective of abnormal wall motion are surrounded by contours reflective of normal wall motion in polar coordinates; and
alerting a medical practitioner when abnormal wall motion is detected.
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Accused Products
Abstract
A method for monitoring cardiac function of a patient during a magnetic resonance imaging (MRI) procedure, including: acquiring an MR image sequence of the patient'"'"'s heart during a cardiac phase; segmenting a left ventricle of the patient'"'"'s heart in the MR image sequence, wherein the segmentation produces endocardial and epicardial contours; representing at least one of the contours in polar or radial coordinates and computing its Fourier transform, wherein the Fourier transform produces Fourier descriptors for the contour; putting a vector of the Fourier descriptors into a classifier, wherein the classifier determines whether the contour reflects normal wall motion in the cardiac phase or whether the contour reflects abnormal wall motion in the cardiac phase; and alerting a medical practitioner when abnormal wall motion is detected.
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Citations
26 Claims
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1. A method for monitoring cardiac function of a patient during a magnetic resonance imaging (MRI) procedure, comprising:
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acquiring an MR image sequence of the patient'"'"'s heart during a cardiac phase; segmenting a left ventricle of the patient'"'"'s heart in the MR image sequence, wherein the segmentation produces endocardial and epicardial contours; representing at least one of the contours in polar or radial coordinates and computing its Fourier transform, wherein the Fourier transform produces Fourier descriptors for the contour; putting a vector of the Fourier descriptors into a classifier, wherein the classifier determines whether the contour reflects normal wall motion in the cardiac phase or whether the contour reflects abnormal wall motion in the cardiac phase, wherein a contour rejected by the classifier using an unconditional, predictive probability of the contour'"'"'s observation vector as a confidence measure is interpreted as a pathological change in the left ventricle'"'"'s myocardial wall motion, wherein contours reflective of abnormal wall motion are surrounded by contours reflective of normal wall motion in polar coordinates; and alerting a medical practitioner when abnormal wall motion is detected. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for monitoring cardiac function of a patient during a magnetic resonance imaging (MRI) procedure, comprising:
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a memory device for storing a program; a processor in communication with the memory device, the processor operative with the program to; acquire an MR image sequence of the patient'"'"'s heart during a cardiac phase; segment a left ventricle of the patient'"'"'s heart in the MR image sequence, wherein the segmentation produces endocardial and epicardial contours; represent at least one of the contours in polar or radial coordinates and compute its Fourier transform, wherein the Fourier transform produces Fourier descriptors for the contour; put a vector of the Fourier descriptors into a classifier, wherein the classifier determines whether the contour reflects normal wall motion in the cardiac phase or whether the contour reflects abnormal wall motion in the cardiac phase by using a confidence measure; and alert a medical practitioner when abnormal wall motion is detected, wherein the confidence measure is defined by - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A non-transitory computer readable medium tangibly embodying a program of instructions executable by a processor to perform method steps for monitoring cardiac function of a patient during a magnetic resonance imaging (MRI) procedure, the method steps comprising:
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acquiring an MR image sequence of the patient'"'"'s heart during a cardiac phase; segmenting a left ventricle of the patient'"'"'s heart in the MR image sequence, wherein the segmentation produces endocardial and epicardial contours; representing at least one of the contours in polar or radial coordinates and computing its Fourier transform, wherein the Fourier transform produces Fourier descriptors for the contour; putting a vector of the Fourier descriptors into a classifier, wherein the classifier determines whether the contour reflects normal wall motion in the cardiac phase or whether the contour reflects abnormal wall motion in the cardiac phase by using a confidence measure; and alerting a medical practitioner when abnormal wall motion is detected, wherein the confidence measure is defined by - View Dependent Claims (20, 21, 22, 23, 24, 25, 26)
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Specification