Medical tissue dynamic simulation method based on force asynchronous diffusion model

A technology of dynamic simulation and diffusion model, applied in simulators, 3D modeling, simulation devices of space navigation conditions, etc., can solve problems such as insufficient precision, and achieve the effect of simplifying the calculation process and high-precision medical dynamic deformation simulation

Inactive Publication Date: 2012-01-11
WUHAN UNIV
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Problems solved by technology

[0006] However, the existing simulation methods lack suitable processing methods for the depressions around the organs and tissues, resulting in insufficient accuracy, and new simulation methods are urgently needed in this field.

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  • Medical tissue dynamic simulation method based on force asynchronous diffusion model
  • Medical tissue dynamic simulation method based on force asynchronous diffusion model
  • Medical tissue dynamic simulation method based on force asynchronous diffusion model

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specific Embodiment approach

[0029] The simulation of soft tissue deformation involves complex mathematical and physical processes, which requires the processing of a large amount of data and the establishment of a physical and real-time tissue deformation model. The invention proposes a novel deformation simulation model-FADM based on force asynchronous diffusion model. see figure 1 , FADM is divided into three parts: model preprocessing part, collision detection part and simulation model solving part. For the internal structure of the soft tissue, the springs with different effects between the FADM particles are classified and the control points are obtained through collision detection. However, FADM inevitably faces complex human organ models in surgical simulation, such as heart, liver and other tissue models. When FADM is used for deformation simulation of a complex human organ model, in the process of establishing a physical model by subdividing its geometric model, there are invalid connections i...

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Abstract

The invention relates to a three-dimensional medical soft tissue model deformation simulation method based on a force asynchronous diffusion model, which includes a preprocessing part for providing a convenient model for a subsequent deformation process, a two-stage collision detection part based on model preprocessing and a high-efficiency model solution part. In order to eliminate the affection of invalid links on the deformation effect, the invention puts forward a regional diffusion algorithm to differentiate internal and external voxels, removes the redundant external voxels of a physical model, which are obtained by division, and achieves the purpose of simplifying the original calculation process under the premise of guaranteeing the surface precision of the physical model. The three-dimensional tissue deformation simulation method presented by the invention can be perfectly applied to the complex organ tissues of the human body.

Description

technical field [0001] The invention belongs to the technical field of medical tissue dynamics simulation and virtual reality, and in particular relates to a medical tissue dynamics simulation method based on a force asynchronous diffusion model. Background technique [0002] Soft tissue deformation of complex human organs is one of the key technologies of medical dynamics simulation, such as virtual surgery simulation, image-based surgical training, surgical tracking and positioning, etc. [0003] Surgical simulation based on virtual reality is becoming more and more popular as an alternative to traditional medical training methods, and medical modeling and simulation technology has been widely used in preoperative and surgical planning fields. The research content includes the interaction and visualization of medical data, the simulation of various changes of virtual human organs under the action of virtual surgical instruments, and the simulation of various sensory feedb...

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Application Information

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IPC IPC(8): G06T17/00G09B9/00
Inventor 袁志勇司伟鑫段昭亮廖祥云
Owner WUHAN UNIV
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