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Real-time simulation method for tissue deformation in laparoscopic surgery

A real-time simulation and laparoscopy technology, applied in design optimization/simulation, special data processing applications, instruments, etc., can solve problems such as high computational complexity and difficulty in real-time simulation, and achieve the effect of meeting real-time requirements

Pending Publication Date: 2021-12-17
CHANGCHUN UNIV OF SCI & TECH +1
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AI Technical Summary

Problems solved by technology

The method of using finite element model to realize soft tissue deformation simulation has been widely studied and applied in recent years. This method has a solid foundation in elastic mechanics and has higher calculation accuracy than other grid models, but its calculation complexity is large. Real-time simulation of soft tissue deformation is difficult to achieve

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  • Real-time simulation method for tissue deformation in laparoscopic surgery
  • Real-time simulation method for tissue deformation in laparoscopic surgery
  • Real-time simulation method for tissue deformation in laparoscopic surgery

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Embodiment Construction

[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0018] A method for real-time simulation of tissue deformation in laparoscopic surgery, the simulation method comprising the following steps:

[0019] A method for real-time simulation of tissue deformation in laparoscopic surgery, the method comprising the following steps:

[0020] Step 1: If figure 1 As shown, the video stream in laparoscopic surgery is collected through the endoscope, and the video stream is subjected to monocular operation through SLAM (Simultaneous Localization And Mapping, synchronous positioning and mapping method) to extract feature points, and the feature points are matched. Accurately obtain the displacement information of the feature points; after making a distribution map of the feature points and registration errors, when 80% or more of the error of the feature points is distributed on the 0 axis, it is considere...

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Abstract

A real-time simulation method for tissue deformation in laparoscopic surgery relates to the field of computer-aided medical treatment, and simulates soft tissue to guarantee viscoelasticity, incompressibility and other characteristics by using a mass spring model of a regular tetrahedron and a conical spring. The mass point spring model using the central regular tetrahedron unit and the conical spring is adopted, when deformation simulation is carried out on the soft tissue, the characteristics of incompressibility, viscoelasticity and the like of the soft tissue can be guaranteed, meanwhile, the simulation rate of about 30 FPS can be achieved, the requirement for real-time performance can be preliminarily met, and the method is suitable for simulation in an operation.

Description

technical field [0001] The invention relates to the field of computer-aided medical treatment, in particular to a method for real-time simulation of tissue deformation in laparoscopic surgery. Background technique [0002] Virtual surgery is the application of virtual reality technology in modern medicine, and it is a multidisciplinary research field. Soft tissue deformation simulation is one of the most important technologies in virtual surgery. Whether it can realistically and real-time simulate the deformation of soft tissue organs under external force is the key to the whole system. [0003] Common soft tissue deformation calculation models are divided into two categories: geometry-based deformation models and physics-based deformation models. Among them, the first type of model only considers the change of geometric shape, but ignores the actual mechanical constitutive equation of soft tissue and the effect of object mass, force or other physical phenomena in the defor...

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Application Information

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IPC IPC(8): G06F30/23G06F30/17G06F111/04G06F119/14
CPCG06F30/23G06F30/17G06F2111/04G06F2119/14Y02T90/00
Inventor 蒋振刚冯冠元师为礼李岩芳苗语何飞赵家石张科曲峰秦俊张丽媛蒋涵欣
Owner CHANGCHUN UNIV OF SCI & TECH
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