期刊
COMPUTERS IN BIOLOGY AND MEDICINE
卷 53, 期 -, 页码 42-47出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.compbiomed.2014.07.012
关键词
Dynamic analysis; Needle insertion; Finite element analysis; Arbitrary Lagrangian-Eulerian method; MR-guided microwave coagulation therapy
类别
资金
- Japan Society for the Promotion of Science, Japan [24592955, 21240017]
- Grants-in-Aid for Scientific Research [21240017, 24592955, 26670554, 26282145] Funding Source: KAKEN
Background: Our goal was to develop a three-dimensional finite element model that enables dynamic analysis of needle insertion for soft materials. To demonstrate large deformation and fracture, we used the arbitrary Lagrangian-Eulerian (ALE) method for fluid analysis. We performed ALE-based finite element analysis for 3% agar gel and three types of copper needle with bevel tips. Methods: To evaluate simulation results, we compared the needle deflection and insertion force with corresponding experimental results acquired with a uniaxial manipulator. We studied the shear stress distribution of agar gel on various time scales. Results: For 30 degrees, 45 degrees, and 60 degrees, differences in deflections of each needle between both sets of results were 2.424, 2.981, and 3.737 mm, respectively. For the insertion force, there was no significant difference for mismatching area error (p < 0.05) between simulation and experimental results. Conclusions: Our results have the potential to be a stepping stone to develop pre-operative surgical planning to estimate an optimal needle insertion path for MR image-guided microwave coagulation therapy and for analyzing large deformation and fracture in biological tissues. (C) 2014 Elsevier Ltd. All rights reserved.
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