Method and device for simulating soft tissue deformation and path cutting

A soft tissue and deformation technology, applied in special data processing applications, complex mathematical operations, instruments, etc., can solve the problems of difficult implementation of remote consultation, affecting the real-time performance of simulation, and low calculation efficiency, reducing the amount of deformation calculation and ensuring real-time simulation. Sex, the effect of reducing complexity

Active Publication Date: 2021-09-03
NANJING UNIV OF INFORMATION SCI & TECH
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Problems solved by technology

However, due to the continuous reorganization of the topological structure of the grid cells during the deformation process of the model, the calculation amount is large and the calculation efficiency is low, which greatly affects the real-time performance of the simulation, so it is difficult to implement in remote consultation

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  • Method and device for simulating soft tissue deformation and path cutting
  • Method and device for simulating soft tissue deformation and path cutting
  • Method and device for simulating soft tissue deformation and path cutting

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Embodiment Construction

[0046] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0047] The present invention provides a method for simulating soft tissue deformation and path cutting, such as figure 1 shown, including the following steps:

[0048] Step 1: Use the finite element model to simulate the deformation of the soft tissue to be simulated, and apply the model reduction method combining intrinsic orthogonal decomposition and Galerkin projection to achieve model reduction during the deformation simulation process.

[0049] According to the medical image data, the finite element model based on the model reduction method is used to construct the deformation model of human organs, and the solution results of a set of finite element full-order models are taken as samples, and on this basis, the eigenorthogonal decomposition and Galio The model reduction method combined with golden projection reduces the full-order model to a reduced-or...

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Abstract

The invention discloses a method and device for simulating soft tissue deformation and path cutting, and the method is used for simulating the troubleshooting and excision process of a stomach lesion area in a virtual operation, and comprises the steps: firstly, simulating the deformation process of stomach soft tissue by using a finite element model; realizing model order reduction by applying a model order reduction method combining intrinsic orthogonal decomposition and Galerkin projection in a deformation process, then forming a cutting path according to an intersection point position formed by collision detection of a surgical machine and the soft tissue, and finally drawing a surface incision generated after the soft tissue is cut by adopting a Bezier curve. Calculation speed and real-time performance of soft tissue deformation simulation by utilizing the finite element model are improved, and a smoother and more natural cutting path and incision effect can be created in the processing of a virtual operation cutting problem.

Description

technical field [0001] The invention relates to a soft tissue force-tactile simulation method, in particular to a method and device for simulating soft tissue deformation and path cutting. Background technique [0002] In recent years, the demand for telemedicine consultation has become increasingly prominent. One of the key technical difficulties in telemedicine consultation is the accurate simulation of the patient's virtual diseased organs, thereby prompting the consulting experts to propose correct, scientific, and appropriate treatment plans, and finally achieve accurate guidance. In the existing virtual organ simulation method, the finite element model discretizes soft tissue organs into finite unit bodies such as tetrahedron and hexahedron, and the unit bodies are connected by grid nodes. The displacement of is expressed as a function of variables. By solving the node displacement, the soft tissue deformation is obtained, and finally the deformation behavior of soft t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23G06F17/12G06F119/02
CPCG06F30/23G06F17/12G06F2119/02
Inventor 张小瑞吴海伦孙伟宋爱国刘佳
Owner NANJING UNIV OF INFORMATION SCI & TECH
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