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A Soft Tissue Deformation Method Based on Spatial Kernel Mapping and Subspace Aggregation

A subspace and soft tissue technology, applied in medical informatics, medical simulation, computer-aided medical procedures, etc., can solve the problems of delay in simulation effect, huge amount of calculation, and difficulty in real-time deformation process, so as to improve deformation effect and accuracy degree of effect

Active Publication Date: 2021-11-09
FUQING BRANCH OF FUJIAN NORMAL UNIV
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Problems solved by technology

On the other hand, due to the nonlinear, anisotropic and complex biomechanical properties of soft tissue, if the method used is not appropriate, it will bring a huge amount of calculation, which will lead to the delay of the simulation effect, and the deformation process is difficult to meet the real-time requirements.

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  • A Soft Tissue Deformation Method Based on Spatial Kernel Mapping and Subspace Aggregation
  • A Soft Tissue Deformation Method Based on Spatial Kernel Mapping and Subspace Aggregation
  • A Soft Tissue Deformation Method Based on Spatial Kernel Mapping and Subspace Aggregation

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Embodiment Construction

[0047] The technical solution of the present invention will be specifically described below in conjunction with the accompanying drawings.

[0048] A soft tissue deformation method based on spatial kernel mapping and subspace aggregation of the present invention comprises the following steps,

[0049] Step S1: During the soft tissue deformation process, deformation will occur between the surgical needle and the triangular mesh surface of the soft tissue model and between the triangular mesh surface, and the deformation is detected by a collision detection method combining triangle surface intersection and AABB;

[0050] Step S2: Embedding data into a specific space in a non-linear manner through the kernel method, and using a linear operation method in the space to solve the non-linear function to obtain a data set;

[0051] Step S3: Include all the units meeting the classification criteria into the set to generate candidate subspaces;

[0052] Step S4: Calculate the aggregat...

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Abstract

The invention relates to a soft tissue deformation method based on spatial kernel mapping and subspace aggregation. In the process of soft tissue deformation, deformation will occur between the surgical needle and the triangular mesh of the soft tissue model and between the triangular mesh, and the deformation is detected by the collision detection method combining the intersection of the triangular mesh and the AABB; through the kernel method Embed the data into a specific space in a nonlinear manner, and use a linear operation method to solve the nonlinear function in the space to obtain a data set; include all units that meet the classification criteria into the set to generate candidate subspaces ;Calculate the aggregation force of the subspace, and select the best subspace by the aggregation force; use the two-dimensional comparison method to separate the pure subspace; judge whether the remaining space is an empty set, until the searched full space data becomes an empty set. The invention can improve the accuracy of the model grid displacement and improve the deformation effect of the soft tissue at the next moment.

Description

technical field [0001] The invention relates to the field of computer graphics, in particular to a soft tissue deformation method based on spatial kernel mapping and subspace aggregation. Background technique [0002] The application number is 201010565036.6, and the name is a soft tissue deformation simulation method. The invention selects the smooth particle hydrodynamics method and uses the viscoelastic model to reflect the biomechanical properties of soft tissues. Although grid calculation is not required, the smooth particle hydrodynamics method The particle density approximation equation cannot be initialized multiple times, and there is a discontinuity in the boundary particles, which will lead to multiple iterations of calculation errors, which in turn will cause the problem of low calculation accuracy. [0003] The application number is 201310697661.X, and the name is a real-time dynamic generation method of a local particle spring model of soft tissue deformation. ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G16H50/50
CPCG16H50/50
Inventor 王娜
Owner FUQING BRANCH OF FUJIAN NORMAL UNIV
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