Finite element model of healthy adult female anal sphincter complex based on MRI
10.13929/j.issn.1003-3289.2024.07.025
- VernacularTitle:基于MRI的健康成年女性肛门括约肌复合体有限元模型
- Author:
Qiuxiang YU
1
,
2
;
Lihua ZHENG
;
Zhengguang CHEN
Author Information
1. 北京中医药大学东直门医院放射科,北京 100700
2. 中日友好医院肛肠科,北京 100029
- Keywords:
anal canal;
magnetic resonance imaging;
sphincter;
puborectalis muscle;
three-dimensional finite element
- From:
Chinese Journal of Medical Imaging Technology
2024;40(7):1083-1086
- CountryChina
- Language:Chinese
-
Abstract:
Objective To observe the simulation of a finite element model of healthy adult female anal sphincter complex(ASC)established based on MRI.Methods One healthy adult female was prospectively enrolled,and an ASC geometric model was constructed using Mimics 3D reconstruction software based on anal MRI.Then the model was meshed with finite elements,and the parameters of the anal sphincter experiment in vitro and normal human anorectal pressure data were referenced to establish a finite element model,and its physiological characteristics and stress distribution were analyzed.Results After applying boundary loads to the ASC finite element model,under resting-state,the contraction deformation occurred on external anal sphincter,with the maximum displacement of 0.02 mm for anal canal and the smaller maximum displacement for internal anal sphincter,and a significant low stress zone in front of the upper inner surface of anal canal was observed.Under forced state,significant dilation and deformation occurred on anal canal,with the maximum displacement of 4.16 mm for the inner surface of anal sphincter.Under contracted state,the anal canal was compressed,and the maximum displacement of 1.89 mm for the inner surface of anal sphincter.Under both resting-state and contracted state,internal and external anal sphincters wholly moved forward.Conclusion The established ASC finite element model based on MRI could simulate the physiological activities and stress distribution of actual female adult muscle to some extent.
