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Proceedings Paper

Comparison of biomechanical breast models: a case study
Author(s): Christine Tanner; Andreas Degenhard; Julia Anne Schnabel; Andrew D. Castellano-Smith; Carmel Hayes; Luke I. Sonoda; Martin O. Leach; D. Rodney Hose; Derek L.G. Hill; David John Hawkes
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Paper Abstract

We present initial results from evaluating the accuracy with which biomechanical breast models based on finite element methods can predict the displacements of tissue within the breast. We investigate the influence of different tissue elasticity values, Poisson's ratios, boundary conditions, finite element solvers and mesh resolutions on one data set. MR images were acquired before and after compressing a volunteer's breast gently. These images were aligned using a 3D non-rigid registration algorithm. The boundary conditions were derived from the result of the non-rigid registration or by assuming no patient motion at the deep or medial side. Three linear and two non-linear elastic material models were tested. The accuracy of the BBMs was assessed by the Euclidean distance of twelve corresponding anatomical landmarks. Overall, none of the tested material models was obviously superior to another regarding the set of investigated values. A major average error increase was noted for partially inaccurate boundary conditions at high Poisson's ratios due to introduced volume change. Maximal errors remained, however, high for low Poisson's ratio due to the landmarks closeness to the inaccurate boundary conditions. The choice of finite element solver or mesh resolution had almost no effect on the performance outcome.

Paper Details

Date Published: 9 May 2002
PDF: 12 pages
Proc. SPIE 4684, Medical Imaging 2002: Image Processing, (9 May 2002); doi: 10.1117/12.467155
Show Author Affiliations
Christine Tanner, Guy's Hospital/King's College London (United Kingdom)
Andreas Degenhard, Institute of Cancer Research and Royal Marsden NHS Trust (United Kingdom)
Julia Anne Schnabel, Guy's Hospital/King's College London (United Kingdom)
Andrew D. Castellano-Smith, Guy's Hospital/King's College London (United Kingdom)
Carmel Hayes, Institute of Cancer Research and Royal Marsden NHS Trust (United Kingdom)
Luke I. Sonoda, Guy's Hospital/King's College London (United Kingdom)
Martin O. Leach, Institute of Cancer Research and Royal Marsden NHS Trust (United Kingdom)
D. Rodney Hose, Univ. of Sheffield (United Kingdom)
Derek L.G. Hill, Guy's Hospital/King's College London (United Kingdom)
David John Hawkes, Guy's Hospital/King's College London (United Kingdom)


Published in SPIE Proceedings Vol. 4684:
Medical Imaging 2002: Image Processing
Milan Sonka; J. Michael Fitzpatrick, Editor(s)

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