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Real-time digital organ cutting method based on metaball model and mixed drive method

A hybrid drive and cutting method technology, applied in the field of virtual surgery, can solve the problems of too many fragmented models and insufficient model convergence speed, and achieve the effect of truly restoring the doctor's surgical environment

Active Publication Date: 2017-06-20
BEIHANG UNIV
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Problems solved by technology

[0005] The technical problem solved by the present invention is: the convergence speed of the traditional model is not enough, and too many fragment models are easily generated when subdividing, and a real-time digital organ cutting method based on the metaball model and hybrid driving method is provided

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  • Real-time digital organ cutting method based on metaball model and mixed drive method
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  • Real-time digital organ cutting method based on metaball model and mixed drive method

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Embodiment Construction

[0043] Such as figure 1 As shown, the process flowchart of a real-time digital organ cutting method based on the metaball model and hybrid driving method in the present invention is divided into four steps, preprocessing process, deformation process, cutting process, and rendering process. The four steps are not performed sequentially. The preprocessing process is the initial step of the method, and then enters the deformation process. When a cutting event occurs, it enters the cutting process. After the cutting process, it returns to the deformation process. The rendering process is accompanied by the deformation and cutting process. process, each deformation and cut needs to be rendered. The deformation process is not an endless loop in the traditional sense, and the deformation process can be interrupted at any time to end the program.

[0044] Step 1, preprocessing process:

[0045] (1) Model reading.

[0046] The system uses 3 types of models, including standard triang...

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Abstract

The invention provides a real-time digital organ cutting method based on a metaball model and a mixed drive method. The method takes the metaball as the basis, and employs a position dynamics and a no-grid method to drive the model at the same time. In order to solve a problem that a metaball needs to be split and combined frequently in a cutting process, the method employs a cutting mode of metaball to a point set to the metaball, and employs the position dynamics method to drive the metaball in the mode, and employs the no-grid method drive a point set generated by the metaball. The method comprises four steps: 1, a preprocessing process: carrying out some initialization operation while reading a model file; 2, a deformation process: carrying out the model drive based on the position dynamics method; 3, a cutting process: driving the model through the mixed drive method, and carrying out the cutting in the mode of metaball to a point set to the metaball; 4, a rendering process: carrying out the rendering of the models at steps 2 and 3. The method can truly simulate the process of cutting a soft tissue in a virtual operation, and is higher in controllability and real-time performance.

Description

technical field [0001] The invention relates to a real-time digital organ cutting method based on a metaball model and a hybrid driving method, which belongs to the technical field of virtual surgery and can also be applied to related fields, including animation and games. Background technique [0002] Laparoscopic surgery is one of the commonly used methods in modern medicine, and it has extremely important significance in treating patients. However, many novice doctors need a lot of training before they can operate proficiently. Most of the surgical training in domestic hospitals now uses substitutes. The use of substitutes has the disadvantages of inaccuracy and fewer sources. With the continuous development of computer technology, virtual reality technology has gradually appeared in the public's field of vision, and it has also brought a new method to the training of medical operations, which is virtual laparoscopic surgery. [0003] In reality, surgery includes many op...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T13/20G06T19/20
CPCG06T13/20G06T19/20G06T2219/008G06T2219/2021G06T2210/41A61B34/10A61B2034/105A61B2034/104G09B23/28G09B23/30G06T17/205G06T17/30G06T2210/21
Inventor 潘俊君颜世增赵沁平
Owner BEIHANG UNIV
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