Simulation for Needle Deflection and Soft Tissue Deformation in Needle Insertion

De Dong Gao; Hao Jun Zheng

doi:10.4028/www.scientific.net/AMR.139-141.889

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 139-141Simulation for Needle Deflection and Soft Tissue...

Simulation for Needle Deflection and Soft Tissue Deformation in Needle Insertion

Abstract:

Needle deflection and soft tissue deformation are the most important factors that affect accuracy in needle insertion. Based on the quasi-static thinking and needle forces, an improved virtual spring model and a finite element method are presented to analyze needle deflection and soft tissue deformation when a needle is inserted into soft tissue. According to the spring model, the trajectory of the needle tip is calculated with MATLAB using different parameters. With the superposed element method, the two and three dimensional quasi-static finite element models are created to simulate the dynamic process of soft tissue deformation using ANSYS software. The two methods will be available for steering the flexible needle to hit the target and avoid the obstacles precisely in the robot-assisted needle insertion.

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Periodical:

Advanced Materials Research (Volumes 139-141)

Pages:

889-892

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.139-141.889

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Online since:

October 2010

Authors:

De Dong Gao, Hao Jun Zheng

Keywords:

Needle Deflection, Needle Insertion, Quasi-Static Finite Element Method, Soft Tissue Deformation, Virtual Spring

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