Method and system for 3D blood vessel localization
First Claim
Patent Images
1. A method, comprising:
- displaying selected views of a 3D image of a portion of a patient'"'"'s vasculature derived from 3D MRI volume data;
selecting a particular image plane of the 3D MRI volume data from a set of available image planes, wherein the selected image plane is the one most nearly perpendicular to the direction of blood flow within the selected blood vessel;
calculating a 2D image corresponding to the selected image plane from the 3D MRI volume data;
defining a region of interest around a selected blood vessel in the 2D image, refining the region of interest to obtain the border of the selected blood vessel, and calculating a center point of the blood vessel;
deriving a set of center points of the selected blood vessel from the 3D MRI volume data as the selected image plane is moved generally along the length of the selected blood vessel;
employing a line-fitting algorithm to fit the derived center points of the blood vessel to one or more lines;
selecting the line of the one or more lines with the maximum length;
defining a location and slice orientation for phase contrast magnetic resonance angiography corresponding to a center and an endpoint of the selected line; and
,performing phase contrast magnetic resonance angiography using the selected location and slice orientation.
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Abstract
A method and apparatus are provided for modeling circulation in a living subject. The method includes the steps of developing a model for living subjects in general and correcting the model to substantially conform to the overall cerebral physiology of the living subject. The method further includes the step of calculating a cerebral flow of the living subject based upon the corrected model and a selected cerebral blood flow perturbation.
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Citations
17 Claims
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1. A method, comprising:
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displaying selected views of a 3D image of a portion of a patient'"'"'s vasculature derived from 3D MRI volume data; selecting a particular image plane of the 3D MRI volume data from a set of available image planes, wherein the selected image plane is the one most nearly perpendicular to the direction of blood flow within the selected blood vessel; calculating a 2D image corresponding to the selected image plane from the 3D MRI volume data; defining a region of interest around a selected blood vessel in the 2D image, refining the region of interest to obtain the border of the selected blood vessel, and calculating a center point of the blood vessel; deriving a set of center points of the selected blood vessel from the 3D MRI volume data as the selected image plane is moved generally along the length of the selected blood vessel; employing a line-fitting algorithm to fit the derived center points of the blood vessel to one or more lines; selecting the line of the one or more lines with the maximum length; defining a location and slice orientation for phase contrast magnetic resonance angiography corresponding to a center and an endpoint of the selected line; and
,performing phase contrast magnetic resonance angiography using the selected location and slice orientation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus, comprising:
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means for displaying selected views of a 3D image of a portion of a patient'"'"'s vasculature derived from 3D MRI volume data; means for allowing selection of a particular image plane of the 3D MRI volume data from a set of available image planes, wherein the selected image plane is the one most nearly perpendicular to the direction of blood flow within the selected blood vessel; means for calculating a 2D image corresponding to the selected image plane from the 3D MRI volume data; means for allowing definition of a region of interest around a selected blood vessel in the 2D image, refining the region of interest to obtain the border of the selected blood vessel, and calculating a center point of the blood vessel; means for deriving a set of center points of the selected blood vessel from the 3D MRI volume data as the selected image plane is moved generally along the length of the selected blood vessel; and
,means for employing a line-fitting algorithm to fit the derived center points of the blood vessel to one or more lines; means for selecting the line of the one or more lines with the maximum length; and
,means for defining a location and slice orientation for phase contrast magnetic resonance angiography corresponding to a center and an endpoint of the selected line. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A method, comprising:
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displaying selected views of a 3D image of a portion of a patient'"'"'s vasculature derived from 3D MRI volume data; constructing the 3D image of a portion of the patient'"'"'s vasculature from the 3D MRI volume data by generating a polygonal mesh corresponding to the surfaces of the blood vessels in the 3D MRI volume data using a marching cube algorithm; selecting a particular image plane of the 3D MRI volume data from a set of available image planes, wherein the selected image plane is the one most nearly perpendicular to the direction of blood flow within the selected blood vessel; calculating a 2D image corresponding to the selected image plane from the 3D MRI volume data; defining a region of interest around a selected blood vessel in the 2D image, refining the region of interest to obtain the border of the selected blood vessel, and calculating a center point of the blood vessel; deriving a set of center points of the selected blood vessel from the 3D MRI volume data as the selected image plane is moved generally along the length of the selected blood vessel; defining a location and slice orientation for phase contrast magnetic resonance angiography corresponding to a selected pair of the identified center points; and
,performing phase contrast magnetic resonance angiography using the selected location and slice orientation.
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Specification