A Soft Tissue Penetration Force Modeling Method Based on Segmented Artificial Neural Network

Abstract

A soft tissue puncture force modeling method based on a segmented artificial neural network, according to the following steps: 1) Select soft tissue samples to be modeled for puncture experiments to collect sample data; 2) Analyze and organize the sample data, and divide all data into The stage is divided into three groups: before the puncture, after the puncture until the deepest point, and pulling out, and then divide each group of data into a training group and a test group; 3) use the training group for neural network training, and then use the test group to evaluate the obtained Neural network; 4) The three neural networks obtained from the training are called in sections according to the puncture stage to complete the modeling. The prediction error of modeling in the present invention is small, within the range that is difficult to detect by human hands; it is easy to model, saves time and effort; it can perform mechanical modeling on the complete process of soft tissue puncture, and can be completed well even in the most nonlinear stage Modeling; the model has a certain general applicability to the same organization of different individuals, and the overall trend of predictive power is consistent with the experimental data.

Description

technical field [0001] The invention belongs to the field of information technology and relates to a biomechanical modeling method. Background technique [0002] In recent years, as the development of virtual reality technology has been highly valued by the country, virtual surgery systems have gradually been accepted and applied in the medical field. Currently, virtual surgery systems on the market are relatively mature in terms of interactive equipment, cutting image modeling, and medical image processing. However, due to the complexity of biomechanics, most systems only stop at the visualization stage, and few have good results A complete system for haptic feedback. The lack of tactile force feedback makes virtual surgery different from clinical surgery, which is also the biggest drawback of the virtual surgery system, which directly causes the virtual surgery system to be ineffective in teaching doctors. [0003] Most of the current soft tissue mechanics models use mas...

AI Technical Summary

Problems solved by technology

Currently, virtual surgery systems on the market are relatively mature in terms of interactive equipment, cutting image modeling, and medical image processing. However, due to the complexity of biomechanics, most systems only stop at the visualization stage, and few have good results A Complete System for Haptic Feedback

The lack of tactile force feedback makes virtual surgery different from clinical surgery, which is also the biggest disadvantage of the virtual surgery system, which directly causes the virtual surgery system to be ineffective in teaching doctors

[0003] Most of the current soft tissue mechanics models use the mass-spring-damper model or finite element model. These methods can achieve certain results, but the former is difficult to accurately model the whole puncture process, and the latter takes a long time and has poor real-time performance.

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