Human swallowing simulation based on videofluorography images using Hamiltonian MPS method

Takahiro Kikuchi, Yukihiro Michiwaki, Tetsu Kamiya, Yoshio Toyama, Tasuku Tamai, Seiichi Koshizuka

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

In developed nations, swallowing disorders and aspiration pneumonia have become serious problems. We developed a method to simulate the behavior of the organs involved in swallowing to clarify the mechanisms of swallowing and aspiration. The shape model is based on anatomically realistic geometry, and the motion model utilizes forced displacements based on realistic dynamic images to reflect the mechanisms of human swallowing. The soft tissue organs are modeled as nonlinear elastic material using the Hamiltonian MPS method. This method allows for stable simulation of the complex swallowing movement. A penalty method using metaballs is employed to simulate contact between organ walls and smooth sliding along the walls. We performed four numerical simulations under different analysis conditions to represent four cases of swallowing, including a healthy volunteer and a patient with a swallowing disorder. The simulation results were compared to examine the epiglottic downfolding mechanism, which strongly influences the risk of aspiration.

Original languageEnglish
Pages (from-to)247-260
Number of pages14
JournalComputational Particle Mechanics
Volume2
Issue number3
DOIs
Publication statusPublished - 2015 Sep 1
Externally publishedYes

Keywords

  • Contact
  • Epiglottis
  • Hamiltonian MPS method
  • Particle method
  • Soft tissue
  • Swallowing

ASJC Scopus subject areas

  • Computational Mechanics
  • Civil and Structural Engineering
  • Numerical Analysis
  • Modelling and Simulation
  • Fluid Flow and Transfer Processes
  • Computational Mathematics

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