A real-time digital organ cutting method based on metasphere model and hybrid drive method

Abstract

The invention provides a real-time digital organ cutting method based on a metaball model and a hybrid driving method. Based on the metaball model, the position dynamics and the meshless method driving model are used simultaneously in the cutting process. In order to solve the problem of metaball For problems that require frequent splitting and merging during the cutting process, a metaball-to-pointset-to-metaball cutting mode is adopted, in which positional dynamics is used to drive metaballs, and meshless methods are used to drive meta The set of points generated by the ball. The method consists of four steps. First, the preprocessing process, which requires some initialization operations while reading the model file; second, the deformation process, which uses a method based on positional dynamics to drive the model; third, the cutting process, which uses The hybrid-driven method drives the model, using the method of metaball to point set and then returning to the metaball to cut; the fourth, the rendering process, renders the model in the second and third processes. The invention can truly simulate the process of cutting soft tissue in virtual surgery, and has high 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...

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