Characterization of the Biomechanical Properties of the Lower Esophagus for Surgical Simulation


Article Preview

In this work a method to characterize soft tissue properties for mechanical modeling is presented. Attention is especially focused on developing a model of the lower esophagus to be used in a surgical simulation, which shows a promise as a training method for medical personnel. The viscoelastic properties of the lower esophageal junction are characterized using data from animal experiments and an inverse FE parameter estimation algorithm. Utilizing the assumptions of quasilinear- viscoelastic theory, the viscoelastic and hyperelastic material parameters are estimated to provide a physically based simulation of tissue deformations in real time. To calibrate the parameters to the experimental results, a three dimensional FE model that simulates the forces at the indenter and an optimization program that updates new parameters and runs the simulation iteratively are developed. It was possible to reduce the time and computation resources by decoupling the viscoelastic part and elastic part in a tissue model. The comparison of the simulation and the experimental behavior of pig esophagus are presented to provide validity to the tissue model using the proposed approach.



Key Engineering Materials (Volumes 326-328)

Edited by:

Soon-Bok Lee and Yun-Jae Kim






C. M. Choi et al., "Characterization of the Biomechanical Properties of the Lower Esophagus for Surgical Simulation", Key Engineering Materials, Vols. 326-328, pp. 835-838, 2006

Online since:

December 2006




[1] E. M. O. Lemme, G. R. Domingues, V. L. C. Pereira, C. G. Firman, and J. Pantoja : Lower Esophagus Sphincter Pressure in Idiopathic Achalasia and Chagas Disease-related Achalasia in Disease of the Esophagus, Vol. 14, (2001) pp.232-234.

DOI: 10.1046/j.1442-2050.2001.00190.x

[2] P. J. Davis, F. J. Carter, D. G. Loxburgh, and A. Cuschieri: Mathematical Model for Keyhole Surgery Simulation: Spleen Capsule as an Elastic Membrane, in Journal of Theoretical Medicine, Vol. 1, (1999), pp.247-262.

[3] B. K. Tay, S. De, N. Stylopoulos, D. W. Rattner, and M. A. Srinivasan: In Vivo Force Response of Intra-abdominal Soft Tissue for the Simulation of Laparoscopic Procedures, Proceedings of the MMVR Conference, (2002).

[4] Y. C. Fung: Biomechanics: Mechanical Properties of Living Tissues. New York: SpringerVerlag (1993).

[5] K. Miller: Constitutive Modeling of Abdominal Organs in Journal of Biomechanics, Vol. 33, (1999), pp.367-373.

[6] M. Kauer, V. Vuskovic, J. Dual, G. Szekely, and M. Bajka: Inverse Finite Element Characterization of Soft Tissue Presented at Medical Image Computing and Computer-Assisted Intervention - MICCAI 2001(2001).

DOI: 10.1007/3-540-45468-3_16

In order to see related information, you need to Login.