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A training method of soft tissue minimally invasive surgery based on virtual reality

A training method and minimally invasive surgery technology, applied in image data processing, 3D modeling, instruments, etc., can solve problems such as low model accuracy, difficult to alleviate doctor-patient problems, and difficulty in meeting the accuracy and real-time requirements of virtual surgery at the same time , to achieve the effects of ensuring force-sense experience, improving simulation accuracy and real-time performance, and good visual effects

Pending Publication Date: 2019-02-05
NANJING INST OF TECH
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Problems solved by technology

[0002] In the field of medicine, there are endless doctor-patient problems caused by doctors' surgical errors, but medical training is a long and expensive process, so the doctor-patient problem has always been an unresolved contradiction
However, due to the complex mechanical properties of soft tissue, most of the existing surgical simulations use the spring-mass model, the model accuracy is low, and the bounding box or hierarchical bounding box method is mostly used for collision detection. sexual demands

Method used

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  • A training method of soft tissue minimally invasive surgery based on virtual reality
  • A training method of soft tissue minimally invasive surgery based on virtual reality
  • A training method of soft tissue minimally invasive surgery based on virtual reality

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Embodiment Construction

[0038] The present invention will be further explained below in conjunction with the drawings.

[0039] Such as figure 1 Shown is a virtual reality-based soft tissue minimally invasive surgery training method, including three parts: three-dimensional modeling, finite element simulation, and surgery simulation. The following is a detailed description of each part.

[0040] 1. Three-dimensional modeling

[0041] Acquire a thin CT image of the patient’s anterior abdomen and import it into the Mimics17.0 software designed by Materialise. The gray threshold segmentation method is used to extract the required parts, which are optimized (preprocessed) in the 3-Matic software, and finally generated in the Geomagicstdio12 software Surfaces and entities, export model files in 3DS format, such as figure 2 . The specific process is as follows:

[0042] (11) Import the patient's abdominal CT data in the Mimics17.0 software designed by Materialise;

[0043] (12) Using gray threshold segmentation m...

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Abstract

The invention discloses a soft tissue minimally invasive surgical training method based on virtual reality, which can enable a user to operate a force feedback device to perform minimally invasive puncture or forceps pulling on the soft tissue, comprising the following steps: 1, reverse modeling the abdominal CT image of a patient; 2, optimize that model; 3, carry out finite element puncture simulation on that model; 4, that finite element simulation result are processed in Matlab software to verify the correctness of the model by compare with the experimental results; 5. Complete the module design of model import, scene rendering, collision detection, deformation algorithm, data input and output of force feedback device in Microsoft Visual Studio 2013 software, and realize the function ofinteraction between user and virtual scene through force feedback device. The invention can improve the system accuracy through modeling and simulation, adopt voxel octree and finite element algorithm, improve the collision and deformation accuracy and real-time, accurately perceive the virtual force through the external force feedback device, and effectively enhance the immersion feeling.

Description

Technical field [0001] The invention relates to a soft tissue minimally invasive surgery training method based on virtual reality, involving virtual reality, material mechanics, finite element analysis, computer vision, collision detection and other technologies. Background technique [0002] In the medical field, doctor-patient problems caused by doctors’ surgical errors are endless, but medical training is a long and expensive process, so doctor-patient problems have always been a contradictory problem that is difficult to alleviate. With the development of virtual reality technology, a variety of virtual surgery training systems have emerged, such as minimally invasive surgery for gallstones and kidney stones. Due to the small trauma to the human body and rapid recovery after surgery, they have become the first in gallstone and kidney stone surgery. One choice, so the virtual minimally invasive surgery training system as an auxiliary medical method has broad application prospe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/20G06T19/00
CPCG06T17/20G06T19/006
Inventor 李宏胜朱卓
Owner NANJING INST OF TECH
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