Abstract
Objective: The objective of our work is to develop and validate a viscoelastic and nonlinear physical liver model for organ model-based needle insertion, in which the deformation of an organ is estimated and predicted, and the needle path is determined with organ deformation taken into consideration. Materials and Methods: First, an overview is given of the development of the physical liver model. The material properties of the liver considering viscoelasticity and nonlinearity are modeled based on the measured data collected from a pig's liver. The method to develop the liver model using FEM is also shown. Second, the experimental method to validate the model is explained. Both in vitro and in vivo experiments that made use of a pig's liver were conducted for comparison with the simulation using the model. Results: Results of the in vitro experiment showed that the model reproduces nonlinear and viscoelastic response of displacement at an internally located point with high accuracy. For a force up to 0.45 N, the maximum error is below 1 mm. Results of the in vivo experiment showed that the model reproduces the nonlinear increase of load upon the needle during insertion. Discussion: Based on these results, the liver model developed and validated in this work reproduces the physical response of a liver in both in vitro and in vivo situations.
| Original language | English |
|---|---|
| Pages (from-to) | 53-63 |
| Number of pages | 11 |
| Journal | International Journal of Computer Assisted Radiology and Surgery |
| Volume | 4 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - Jan 1 2009 |
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All Science Journal Classification (ASJC) codes
- Surgery
- Biomedical Engineering
- Radiology Nuclear Medicine and imaging
- Computer Vision and Pattern Recognition
- Health Informatics
- Computer Science Applications
- Computer Graphics and Computer-Aided Design
Cite this
Development and validation of a viscoelastic and nonlinear liver model for needle insertion. / Kobayashi, Yo; Onishi, Akinori; Hoshi, Takeharu; Kawamura, Kazuya; Hashizume, Makoto; Fujie, Masakatsu G.
In: International Journal of Computer Assisted Radiology and Surgery, Vol. 4, No. 1, 01.01.2009, p. 53-63.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Development and validation of a viscoelastic and nonlinear liver model for needle insertion
AU - Kobayashi, Yo
AU - Onishi, Akinori
AU - Hoshi, Takeharu
AU - Kawamura, Kazuya
AU - Hashizume, Makoto
AU - Fujie, Masakatsu G.
PY - 2009/1/1
Y1 - 2009/1/1
N2 - Objective: The objective of our work is to develop and validate a viscoelastic and nonlinear physical liver model for organ model-based needle insertion, in which the deformation of an organ is estimated and predicted, and the needle path is determined with organ deformation taken into consideration. Materials and Methods: First, an overview is given of the development of the physical liver model. The material properties of the liver considering viscoelasticity and nonlinearity are modeled based on the measured data collected from a pig's liver. The method to develop the liver model using FEM is also shown. Second, the experimental method to validate the model is explained. Both in vitro and in vivo experiments that made use of a pig's liver were conducted for comparison with the simulation using the model. Results: Results of the in vitro experiment showed that the model reproduces nonlinear and viscoelastic response of displacement at an internally located point with high accuracy. For a force up to 0.45 N, the maximum error is below 1 mm. Results of the in vivo experiment showed that the model reproduces the nonlinear increase of load upon the needle during insertion. Discussion: Based on these results, the liver model developed and validated in this work reproduces the physical response of a liver in both in vitro and in vivo situations.
AB - Objective: The objective of our work is to develop and validate a viscoelastic and nonlinear physical liver model for organ model-based needle insertion, in which the deformation of an organ is estimated and predicted, and the needle path is determined with organ deformation taken into consideration. Materials and Methods: First, an overview is given of the development of the physical liver model. The material properties of the liver considering viscoelasticity and nonlinearity are modeled based on the measured data collected from a pig's liver. The method to develop the liver model using FEM is also shown. Second, the experimental method to validate the model is explained. Both in vitro and in vivo experiments that made use of a pig's liver were conducted for comparison with the simulation using the model. Results: Results of the in vitro experiment showed that the model reproduces nonlinear and viscoelastic response of displacement at an internally located point with high accuracy. For a force up to 0.45 N, the maximum error is below 1 mm. Results of the in vivo experiment showed that the model reproduces the nonlinear increase of load upon the needle during insertion. Discussion: Based on these results, the liver model developed and validated in this work reproduces the physical response of a liver in both in vitro and in vivo situations.
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U2 - 10.1007/s11548-008-0259-9
DO - 10.1007/s11548-008-0259-9
M3 - Article
C2 - 20033602
AN - SCOPUS:63149131505
VL - 4
SP - 53
EP - 63
JO - Computer-Assisted Radiology and Surgery
JF - Computer-Assisted Radiology and Surgery
SN - 1861-6410
IS - 1
ER -