Extraction of myocardial contour points
First Claim
1. A method performed by a computer processing unit executing computer readable instructions, stored in a non-transitory computer-readable memory, comprising:
- (a) creating a summed 3D nuclear medicine imaging data by summing a plurality of 3D nuclear medicine imaging data pixel by pixel, wherein each of the plurality of 3D nuclear medicine imaging data is associated with a plurality of different phases of a cardiac cycle;
(b) determining pixels corresponding to myocardial regions in the summed 3D nuclear medicine imaging data;
(c) defining a plurality of tracing directions based on the summed 3D nuclear medicine imaging data, and determining a reference myocardial center base point, a reference inner myocardial wall base point and a reference outer myocardial wall base point for each tracing direction of the plurality of tracing directions;
(d) determining a phase-specific myocardial center base point for each tracing direction of the plurality of tracing directions for each phase of the plurality of different phases based on the corresponding 3D nuclear medicine imaging data; and
(e) determining a difference in position of the reference myocardial center base point and the phase-specific myocardial center base point, and determining a phase-specific inner myocardial wall base point and a phase-specific outer myocardial wall base point by shifting the reference inner myocardial wall base point and the reference outer myocardial wall base point respectively based on the determined difference, for each tracing direction of the plurality of tracing directions for each phase of the plurality of different phases.
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Accused Products
Abstract
One of the preferred embodiments includes: (a) creating a summed 3D nuclear medicine imaging data by summing a plurality of 3D nuclear medicine imaging data pixel by pixel; (b) determining pixels corresponding to myocardial regions in the summed 3D nuclear medicine imaging data; (c) defining a plurality of tracing directions based on the summed 3D nuclear medicine imaging data, and determining a reference myocardial center base point, a reference inner myocardial wall base point and a reference outer myocardial wall base point for each of the tracing directions; (d) determining a phase-specific myocardial center base point for each of the tracing directions for each of the phases; and (e) seeking a difference between the reference myocardial center base point and the phase-specific myocardial center base point, and determining a phase-specific inner myocardial wall base point and a phase-specific outer myocardial wall base point.
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Citations
24 Claims
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1. A method performed by a computer processing unit executing computer readable instructions, stored in a non-transitory computer-readable memory, comprising:
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(a) creating a summed 3D nuclear medicine imaging data by summing a plurality of 3D nuclear medicine imaging data pixel by pixel, wherein each of the plurality of 3D nuclear medicine imaging data is associated with a plurality of different phases of a cardiac cycle; (b) determining pixels corresponding to myocardial regions in the summed 3D nuclear medicine imaging data; (c) defining a plurality of tracing directions based on the summed 3D nuclear medicine imaging data, and determining a reference myocardial center base point, a reference inner myocardial wall base point and a reference outer myocardial wall base point for each tracing direction of the plurality of tracing directions; (d) determining a phase-specific myocardial center base point for each tracing direction of the plurality of tracing directions for each phase of the plurality of different phases based on the corresponding 3D nuclear medicine imaging data; and (e) determining a difference in position of the reference myocardial center base point and the phase-specific myocardial center base point, and determining a phase-specific inner myocardial wall base point and a phase-specific outer myocardial wall base point by shifting the reference inner myocardial wall base point and the reference outer myocardial wall base point respectively based on the determined difference, for each tracing direction of the plurality of tracing directions for each phase of the plurality of different phases. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus comprising at least one processor and at least one memory including computer program code, wherein the at least one memory and the computer code are configured, with the at least one processor, to cause the apparatus to at least perform the following:
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(a) creating a summed 3D nuclear medicine imaging data by summing a plurality of 3D nuclear medicine imaging data pixel by pixel, wherein each of the plurality of 3D nuclear medicine imaging data is associated with a plurality of different phases of a cardiac cycle; (b) determining pixels corresponding to myocardial regions in the summed 3D nuclear medicine imaging data; (c) defining a plurality of tracing directions based on the summed 3D nuclear medicine imaging data, and determining a reference myocardial center base point, a reference inner myocardial wall base point and a reference outer myocardial wall base point for each tracing direction of the plurality of tracing directions; (d) determining a phase-specific myocardial center base point for each tracing direction of the plurality of tracing directions for each phase of the plurality of different phases based on the corresponding 3D nuclear medicine imaging data; and (e) determining a difference in position of the reference myocardial center base point and the phase-specific myocardial center base point, and determining a phase-specific inner myocardial wall base point and a phase-specific outer myocardial wall base point by shifting the reference inner myocardial wall base point and the reference outer myocardial wall base point respectively based on the determined difference, for each tracing direction of the plurality of tracing directions for each phase of the plurality of different phases. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A computer program product embodied on a non-transitory computer-readable medium in which a computer program is stored that, when being executed by a computer, is configured to provide instructions to control or carry out:
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(a) creating a summed 3D nuclear medicine imaging data by summing a plurality of 3D nuclear medicine imaging data pixel by pixel, wherein each of the plurality of 3D nuclear medicine imaging data is associated with a plurality of different phases of a cardiac cycle; (b) determining pixels corresponding to myocardial regions in the summed 3D nuclear medicine imaging data; (c) defining a plurality of tracing directions based on the summed 3D nuclear medicine imaging data, and determining a reference myocardial center base point, a reference inner myocardial wall base point and a reference outer myocardial wall base point for each tracing direction of the plurality of tracing directions; (d) determining a phase-specific myocardial center base point for each tracing direction of the plurality of tracing directions for each phase of the plurality of different phases based on the corresponding 3D nuclear medicine imaging data; and (e) determining a difference in position of the reference myocardial center base point and the phase-specific myocardial center base point, and determining a phase-specific inner myocardial wall base point and a phase-specific outer myocardial wall base point by shifting the reference inner myocardial wall base point and the reference outer myocardial wall base point respectively based on the determined difference, for each tracing direction of the plurality of tracing directions for each phase of the plurality of different phases. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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Specification