System and method of anatomical modeling
First Claim
1. In a biomedical simulation environment, a method of forming a visually continuous surface across a joint of a plurality of anatomical branches, the method including the steps of:
- generating surfaces for the anatomical branches using a part-surface sweeping operation; and
constructing surfaces across any holes in the surface across the joint using a patch filling method to complete the joint surface.
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Accused Products
Abstract
Methods of modeling anatomical structures, along with pathology including the vasculature, spine and internal organs, for visualization and manipulation in simulation systems. A representation of on the human vascular network is built up from medical images and a geometrical model produced therefrom by extracting topological and geometrical information. The model is constructed using topological and geometrical information. The model is constructed using segments containing topology structure information, flow domain information contour domain information and skeletal domain information. A realistic surface is then applied to the geometric model, by generating a trajectory along a central axis of the geometric model, conducting moving trihedron modeling along the generated trajectory and then creating a sweeping surface along the trajectory. A novel joint reconstruction approach is also proposed whereby a part surface sweeping operation is performed across branches of the joint and then a surface created over the resultatn holes therebetween. A 3-D mesh may also be generated, based upon this model, for finite element analysis and pathology creation.
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Citations
27 Claims
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1. In a biomedical simulation environment, a method of forming a visually continuous surface across a joint of a plurality of anatomical branches, the method including the steps of:
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generating surfaces for the anatomical branches using a part-surface sweeping operation; and
constructing surfaces across any holes in the surface across the joint using a patch filling method to complete the joint surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 26, 27)
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12. In a biomedical simulation environment, a method of pathological modeling for use in the simulation of the growth of a pathology, the method including:
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creating a 3D surface model of the pathology;
applying outward force at one or more surface points of the model; and
calculating the degree of each force and the degree of deformation of the model at the one or more surface points as a result of each force.
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13. In a biomedical simulation environment, a method of pathological modeling for use in the simulation of the growth of a pathology, the method including:
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creating a 3D surface model of the pathology;
applying an appropriate weight function to the model, the weight function relating to the shape of the pathology being modeled. - View Dependent Claims (14, 15)
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16. In a biomedical simulation environment, a method of interactive pathological modeling, the method including:
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obtaining angiographic observations relating to a pathology;
extracting geometric parameter bounds relating to the pathology from the angiographic observations;
incorporating the pathological parameters into a geometric anatomical model;
constructing a 3D anatomical model including the pathology from the geometric model such that the shape of the pathology is capable of modification by a user within the geometric parameter bounds.
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17. In a biomedical simulation environment, a method of automatically generating FEM mesh on a virtual anatomical object model for use in simulating deformation of at least a portion of the object, the model being formed from a plurality of cross-sections each having a plurality of points on the edges of the cross-sections with edge lengths between adjacent points on each cross-section, the method including the steps of:
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undertaking 2D mesh generation at each cross-section; and
undertaking 3D mesh generation between two adjacent cross sections by subdividing edge lengths of each cross-section to form one or more additional points and connecting corresponding points between adjacent cross-sections; and
undertaking mesh refinement and/or optimization of the resultant 3D mesh. - View Dependent Claims (18)
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19. Computer program product including a computer usable medium having computer readable program code and computer readable system code embodied on said medium for generating a mesh on a virtual geometric model for FEM analysis, the model formed from a plurality of cross-sections each having a plurality of points on the edges of the cross-sections with edge lengths between adjacent points on each cross-section, said computer program product further including computer readable code within said computer usable medium for:
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undertaking 2D mesh generation at each cross-section; and
undertaking 3D mesh generation between two adjacent cross sections by subdividing edge lengths of each cross-section to form one or more additional points and connecting corresponding points between adjacent cross-sections; and
undertaking mesh refinement and/or optimization of the resultant 3D mesh.
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20. Method of automatically generating a surface mesh on a object model for use in FEM analysis, the model being formed from a plurality of cross-sections each having a plurality of points on the edges of the cross-sections with edge lengths between adjacent points on each cross-section, the method including the steps of:
undertaking 3D mesh generation between two adjacent cross sections by subdividing edge lengths of each cross-section to form one or more additional points and connecting corresponding points between adjacent cross-sections.
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21. Method of validating the accuracy of a geometric model, including the steps of:
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generating a first binary volume image relating to the geometric model;
generating a second binary volume image relating to a validation threshold;
comparing the first binary volume image with the second binary volume image in order to obtain an indication relating to the degree of accuracy of the geometric model. - View Dependent Claims (22, 23, 24, 25)
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Specification