2020
DOI: 10.1002/cnm.3377
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Diffuse domain method for needle insertion simulations

Abstract: We present a new strategy for needle insertion simulations without the necessity of meshing. A diffuse domain approach on a regular grid is applied to overcome the need for an explicit representation of organ boundaries. A phase field function captures the transition of tissue parameters and boundary conditions are imposed implicitly. Uncertainties of a volume segmentation are translated in the width of the phase field, an approach that is novel and overcomes the problem of defining an accurate segmentation bo… Show more

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Cited by 3 publications
(12 citation statements)
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“…In the diffuse formulation of the linear elastic tissue (Equation ( 4)) there are three phase field contributions: The phase field function ϕ for the distribution of the different tissue types, the absolute gradient of the phase field function j rϕ j for the traction boundary condition, and the two penalty terms multiplied by β for the application of Dirichlet boundary conditions. The convergence of the first two parts was shown in our previous work 3 and will therefore not be repeated.…”
Section: Diffuse Domain Equationsmentioning
confidence: 92%
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“…In the diffuse formulation of the linear elastic tissue (Equation ( 4)) there are three phase field contributions: The phase field function ϕ for the distribution of the different tissue types, the absolute gradient of the phase field function j rϕ j for the traction boundary condition, and the two penalty terms multiplied by β for the application of Dirichlet boundary conditions. The convergence of the first two parts was shown in our previous work 3 and will therefore not be repeated.…”
Section: Diffuse Domain Equationsmentioning
confidence: 92%
“…This sliding friction is the main component leading to tissue deformation and is modeled as a force boundary condition to the tissue with magnitude t and in direction parallel to the needle shaft. 3…”
Section: Needle Insertionmentioning
confidence: 99%
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