A simple method for extracting the natural beauty of hair
SIGGRAPH '92 Proceedings of the 19th annual conference on Computer graphics and interactive techniques
3D needle-tissue interaction simulation for prostate brachytherapy
MICCAI'05 Proceedings of the 8th international conference on Medical Image Computing and Computer-Assisted Intervention - Volume Part I
Needle insertion parameter optimization for Brachytherapy
IEEE Transactions on Robotics
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Modeling the deflection of flexible needles is an essential part of needle insertion simulation and path planning. In this paper, three models are compared in terms of accuracy in simulating the bending of a prostate brachytherapy needle. The first two utilize the finite element method, one using geometric non-linearity and triangular plane elements, the other using non-linear beam elements. The third model uses angular springs to model cantilever deflection. The simulations are compared with the experimental bent needle configurations. The models are assessed in terms of geometric conformity using independently identified and pre-identified model parameters. The results show that the angular spring model, which is also the simplest, simulates the needle more accurately than the others.