Swallowing Simulation Using Particle Method for 3D Deformation
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Solution Overview
Problem
Current methods for simulating swallowing, such as videofluoroscopic swallowing and myoelectric potential measurement, are burdensome for subjects and struggle to accurately capture the complex three-dimensional movements of the head-and-neck organs and orally-ingested products, particularly failing to reproduce large deformations and sprays during swallowing.
Innovation Solution
A dynamic three-dimensional swallowing simulation apparatus using a particle method to model the head-and-neck organs and orally-ingested products, allowing for accurate analysis of their movements and physical properties in a virtual three-dimensional space, enabling the simulation of swallowing behaviors and quantification of physical quantities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If videofluoroscopic swallowing or myoelectric potential measurement is used to obtain biological information, then swallowing behavior can be observed, but the examinee bears a heavy burden and the method cannot accurately capture complex three-dimensional movements
Solution Approach 1:
The invention creates a virtual copy of the head-and-neck organ and orally-ingested product in a computer-based simulation system. Instead of observing real subjects through videofluoroscopy, the system replicates swallowing behavior in a virtual environment, eliminating the burden on examinee while maintaining measurement accuracy through numerical simulation of physical properties and movements.
2Ease of manufacture
If conventional lattice method is used for numerical analysis, then calculations can be performed at grid points, but large deformations and sprays during swallowing cannot be reproduced
Solution Approach 1:
The invention replaces the conventional lattice method with a particle method where the orally-ingested product is represented as discrete particles rather than a continuous field. This substitution enables accurate reproduction of large deformations and spray phenomena during swallowing while maintaining computational feasibility through particle-based numerical calculations.
3Device complexity
If two-dimensional simulation is used to analyze swallowing behavior, then calculation complexity is reduced, but three-dimensional movements and large deformations cannot be accurately expressed
Solution Approach 1:
The invention transitions from two-dimensional simulation to three-dimensional particle method simulation. By representing the head-and-neck organ and orally-ingested product in three-dimensional space with particles, the system can accurately capture complex three-dimensional movements and large deformations during swallowing while managing computational complexity through efficient particle-based algorithms.
Data Source
AI summary
A swallowing simulation apparatus that facilitate approximately reproducing an actual phenomenon of swallowing and allows quantifying a physical quantity related to a behavior and a physical property of an orally-ingested product is provided. The swallowing simulation apparatus 100A comprises a head-and-neck modeling unit 10 configured to form a dynamic three-dimensional model of the head-and-neck 10a that includes head-and-neck organs, an organ movement setting unit 30 configured to set movements of the respective head-and-neck organs in the dynamic three-dimensional model of the head-and-neck, an orally-ingested-product physical-property setting unit 40 configured to set an orally-ingested product as an analysis target and a physical property of the orally-ingested product, an input unit 81 configured to input a pseudo-orally-ingested product 20 formed by modeling the orally-ingested product to an oral cavity, a movement analysis unit 50 configured to analyze the movements of the respective head-and-neck organs in the dynamic three-dimensional model of the head-and-neck 10a and a behavior of the pseudo-orally-ingested product 20 during swallowed in a three-dimensional space using a particle method, and a display unit 82 configured to display an analysis result of the movements of the respective head-and-neck organs and the behavior of the pseudo-orally-ingested product during swallowed that are analyzed by the movement analysis unit 50 on a movement screen.