Rapid quantitative evaluations of heart function with strain measurements from MRI
First Claim
1. A medical workstation, comprising:
- at least one display; and
a circuit at least partially onboard or in communication with an MRI Scanner and in communication with the at least one display, the circuit comprising at least one processor configured to;
obtain a plurality of series of MRI images of long and short axis planes of a heart of a patient, wherein each series of the plurality of series of MRI images is taken over a different single beat of the heart of the patient during an image session associated with a time period for obtaining the plurality of series of MRI images of the long and short axis planes that is five minutes or less of active scan time and with the patient in a bore of the MRI Scanner;
measure strain of myocardial heart tissue of the heart of the patient based on the plurality of series of MRI images of the heart of the patient;
generate longitudinal and circumferential heart models with a plurality of adjacent compartments, wherein the compartments are color-coded based on the measured strain;
obtain a first preliminary series of MRI images of the heart, prior to obtaining the plurality of series of MRI images of long and short axis planes, from transverse, sagittal and coronal planes to generate a pseudo two chamber view of the heart to determine orientation of the heart of the patient in the bore of the MRI Scanner;
identify a pseudo two-chamber plane or a pseudo four-chamber plane from the obtained first preliminary series of MRI images;
obtain a second preliminary series of MRI images, prior to obtaining the plurality of series of MRI images of long and short axis planes, from the pseudo two-chamber plane or the pseudo four-chamber plane over a single heartbeat;
generate a pseudo two-chamber strain encoded movie from the second preliminary series of MRI images of the pseudo two-chamber plane or generate a pseudo four-chamber strain encoded movie from the second preliminary series of MRI images of the pseudo four-chamber plane;
thenidentify a pseudo four-chamber plane from the pseudo two chamber strain encoded movie or identify a pseudo two-chamber plane from the pseudo four chamber strain encoded movie;
identify three short axis imaging planes from the pseudo two chamber strain encoded movie as the three short axis imaging planes for the plurality of series of the MRI images for the strain measurements;
generate short axis basal (SAB), short axis medial (SAM) and short axis apical (SAA) strain encoded movies from the series of MRI images of the three identified short axis imaging planes; and
identify three long axis imaging planes from the pseudo two chamber strain encoded movie as the three long axis imaging planes for the plurality of series of MRI images for the strain measurements.
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Abstract
Rapid quantitative evaluations of heart function are carried out with strain measurements from Magnetic Resonance Imaging (MRI) images using a circuit at least partially onboard or in communication with an MRI Scanner and in communication with the at least one display, the circuit including at least one processor that: obtains a plurality of series of MRI images of long and short axis planes of a heart of a patient, with each series of the MRI images is taken over a different single beat of the heart of the patient during an image session that is five minutes or less of active scan time and with the patient in a bore of the MRI Scanner; measures strain of myocardial heart tissue of the heart of the patient based on the plurality of series of MRI images of the heart of the patient; and generates longitudinal and circumferential heart models with a plurality of adjacent compartments, wherein the compartments are color-coded based on the measured strain.
31 Citations
12 Claims
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1. A medical workstation, comprising:
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at least one display; and a circuit at least partially onboard or in communication with an MRI Scanner and in communication with the at least one display, the circuit comprising at least one processor configured to; obtain a plurality of series of MRI images of long and short axis planes of a heart of a patient, wherein each series of the plurality of series of MRI images is taken over a different single beat of the heart of the patient during an image session associated with a time period for obtaining the plurality of series of MRI images of the long and short axis planes that is five minutes or less of active scan time and with the patient in a bore of the MRI Scanner; measure strain of myocardial heart tissue of the heart of the patient based on the plurality of series of MRI images of the heart of the patient; generate longitudinal and circumferential heart models with a plurality of adjacent compartments, wherein the compartments are color-coded based on the measured strain; obtain a first preliminary series of MRI images of the heart, prior to obtaining the plurality of series of MRI images of long and short axis planes, from transverse, sagittal and coronal planes to generate a pseudo two chamber view of the heart to determine orientation of the heart of the patient in the bore of the MRI Scanner; identify a pseudo two-chamber plane or a pseudo four-chamber plane from the obtained first preliminary series of MRI images; obtain a second preliminary series of MRI images, prior to obtaining the plurality of series of MRI images of long and short axis planes, from the pseudo two-chamber plane or the pseudo four-chamber plane over a single heartbeat; generate a pseudo two-chamber strain encoded movie from the second preliminary series of MRI images of the pseudo two-chamber plane or generate a pseudo four-chamber strain encoded movie from the second preliminary series of MRI images of the pseudo four-chamber plane;
thenidentify a pseudo four-chamber plane from the pseudo two chamber strain encoded movie or identify a pseudo two-chamber plane from the pseudo four chamber strain encoded movie; identify three short axis imaging planes from the pseudo two chamber strain encoded movie as the three short axis imaging planes for the plurality of series of the MRI images for the strain measurements; generate short axis basal (SAB), short axis medial (SAM) and short axis apical (SAA) strain encoded movies from the series of MRI images of the three identified short axis imaging planes; and identify three long axis imaging planes from the pseudo two chamber strain encoded movie as the three long axis imaging planes for the plurality of series of MRI images for the strain measurements. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A medical workstation, comprising:
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at least one display; and a circuit at least partially onboard or in communication with an MRI Scanner and in communication with the at least one display, the circuit comprising at least one processor configured to; obtain a first plurality of series of MRI images of long and short axis planes of a heart of a patient, wherein each series of the first plurality of series of MRI images is taken over a different single beat of the heart of the patient during an image session associated with a time period for obtaining the first plurality of series of MRI images of the long and short axis planes that is five minutes or less of active scan time and with the patient in a bore of the MRI Scanner; measure strain of myocardial heart tissue of the heart of the patient to generate a first set of strain measurements based on the obtained first plurality of series of MRI images of the heart of the patient; generate a first set of longitudinal and circumferential heart models with a plurality of adjacent compartments, wherein the compartments are color-coded based on the measured strain; obtain a second plurality of series of MRI images of long and short axis planes of the heart of the patient after a physical or chemically induced stress challenge, wherein each series of the second plurality of series of the MRI images is taken over a different single heartbeat of the heart of the patient during an image session associated with a time period for obtaining the second plurality of series of MRI images of the long and short axis planes that is five minutes or less of active scan time and with the patient in the bore of the MRI Scanner; obtain a second set of strain measurements of the myocardial heart tissue of the heart of the patient based on the second plurality of series of MRI images of the heart of the patient; and generate; a post-challenge set of the longitudinal and circumferential heart models with the plurality of adjacent compartments, wherein the compartments are color-coded based on the second set of strain measurements from the second plurality of series of MRI images; and a post-challenge set of the longitudinal and circumferential heart models with the plurality of adjacent compartments, wherein the compartments are color-coded based on a difference between the first and second sets of strain measurements, and wherein the circuit is configured to cause the at least one display to concurrently display both of the post-challenge sets of the longitudinal and circumferential heart models with the first set of the longitudinal and circumferential heart models. - View Dependent Claims (8)
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9. A medical workstation, comprising:
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at least one display; and a circuit at least partially onboard or in communication with an MRI Scanner and in communication with the at least one display, the circuit comprising at least one processor configured to; obtain a first plurality of series of MRI images of long and short axis planes of a heart of a patient, wherein each series of the first plurality of series of MRI images is taken over a different single beat of the heart of the patient during an image session associated with a time period for obtaining the first plurality of series of MRI images of the long and short axis planes that is five minutes or less of active scan time and with the patient in a bore of the MRI Scanner; measure strain of myocardial heart tissue of the heart of the patient to generate a first set of strain measurements based on the first plurality of series of MRI images of the heart of the patient; generate a first set of longitudinal and circumferential heart models with a plurality of adjacent compartments, wherein the compartments are color-coded based on the measured strain; obtain a second plurality of series of MRI images of long and short axis planes of the heart of the patient after a physical or chemically induced stress challenge, wherein each series of the second plurality of series of MRI images is taken over a different single heartbeat of the heart of the patient during an image session associated with a time period for obtaining the second plurality of series of MRI images of the long and short axis planes that is five minutes or less of active scan time and with the patient in the bore of a respective MRI Scanner; and measure strain of myocardial heart tissue of the heart of the patient to generate a second set of strain measurements based on the second plurality of series of MRI images of the heart of the patient; and generate at least one of; a post-challenge set of the longitudinal and circumferential heart models with the plurality of adjacent compartments, wherein the compartments are color-coded based on the second set of strain measurements from the second plurality of series of MRI image slices;
ora post-challenge set of the longitudinal and circumferential heart models with the plurality of adjacent compartments, wherein the compartments are color-coded based on a difference between the first and second sets of strain measurements, and wherein the physical or chemically induced stress challenge is a low stress challenge corresponding to an increase in heart rate of 10-20 beats per minute.
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10. A medical workstation, comprising:
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at least one display; and a circuit at least partially onboard or in communication with an MRI Scanner and in communication with the at least one display, the circuit comprising at least one processor configured to; obtain a first series of MRI images of a heart of a patient from transverse, sagittal and coronal planes of the heart to determine orientation of the heart of the patient in a bore of the MRI Scanner; identify a pseudo two-chamber plane or a pseudo four-chamber plane from the obtained first series of MM images; obtain a second series of MRI images of the heart from the pseudo two-chamber plane or the pseudo four-chamber plane over a single heartbeat; generate a pseudo two-chamber strain encoded movie of the heart from the second series of MM images of the pseudo two-chamber plane or generate a pseudo four-chamber strain encoded movie of the heart from the second series of MM images of the pseudo four-chamber plane;
thenidentify a pseudo four-chamber plane from the pseudo two chamber strain encoded movie or identify a pseudo two-chamber plane from the pseudo four chamber strain encoded movie; identify three short axis imaging planes from the pseudo two chamber strain encoded movie; identify three long axis imaging planes from the pseudo two chamber strain encoded movie or the pseudo four chamber strain encoded movie; obtain a third plurality of series of MRI images from the identified long and short axis planes of the heart; measure strain of myocardial heart tissue of the heart of the patient based on the obtained third plurality of series of MRI images of the heart; and generate longitudinal and circumferential heart models with a plurality of adjacent compartments, wherein the compartments are color-coded based on the measured strain, wherein each series of the third plurality of series of MRI images is taken over a different single heartbeat of the heart of the patient during an image session associated with a time period for obtaining the third plurality of series of MRI images of the long and short axis planes that is five minutes or less of active scan time and with the patient in a bore of the MRI Scanner. - View Dependent Claims (11, 12)
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Specification