Title :
Compact support radial basis functions for soft tissue deformation
Author :
Wachowiak, Mark P. ; Wang, Xiaogang ; Fenster, Aaron ; Peters, Terry M.
Author_Institution :
Robarts Res. Inst., London, Ont., Canada
Abstract :
We describe the use of compact support radial basis functions (CSRBFs) for simulation of soft tissue deformation. CSRBFs allow surface and volumetric deformations to be computed in near real time. In comparison to other spline functions, CSRBFs effect local deformations. In addition, CSRBF matrices are guaranteed to be positive definite and invertible. Visual realism can be achieved by utilizing different CSRBFs with deformation behaviour approximating specific soft tissue characteristics, and by a locality parameter. Computations can also be performed in parallel for increased efficiency. The efficacy of this deformation model is demonstrated on data from a 3D prostate image for the application of needle insertion for implanting radioactive seeds for brachytherapy.
Keywords :
biological organs; biological tissues; biomechanics; deformation; medical computing; radial basis function networks; 3D prostate image; brachytherapy; compact support RBF; compact support radial basis function; deformation model; needle insertion; radioactive seeds implanting; soft tissue characteristics; soft tissue deformation; surface deformation; volumetric deformation; Biological tissues; Brachytherapy; Computational modeling; Concurrent computing; Deformable models; Finite element methods; Needles; Polynomials; Spline; Surgery;
Conference_Titel :
Biomedical Imaging: Nano to Macro, 2004. IEEE International Symposium on
Print_ISBN :
0-7803-8388-5
DOI :
10.1109/ISBI.2004.1398774
