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Breast cancer is one of the biggest killers in the western world, and early diagnosis is essential for improved prognosis. The shape of the breast varies hugely between the scenarios of magnetic resonance (MR) imaging (patient lies prone, breast hanging down under gravity), X-ray mammography (breast strongly compressed) and ultrasound or biopsy/surgery (patient lies supine), rendering image fusion an extremely difficult task. This paper is concerned with the use of the finite-element method and nonlinear elasticity to build a 3-D, patient-specific, anatomically accurate model of the breast. The model is constructed from MR images and can be deformed to simulate breast shape and predict tumor location during mammography or biopsy/surgery. Two extensions of the standard elasticity problem need to be solved: an inverse elasticity problem (arising from the fact that only a deformed, stressed, state is known initially), and the contact problem of modeling compression. The model is used for craniocaudal mediolateral oblique mammographic image matching, and a number of numerical experiments are performed.

Original publication

DOI

10.1109/TBME.2008.925714

Type

Journal article

Journal

IEEE Trans Biomed Eng

Publication Date

10/2008

Volume

55

Pages

2471 - 2480

Keywords

Biopsy, Breast, Breast Neoplasms, Elasticity, Female, Finite Element Analysis, Humans, Imaging, Three-Dimensional, Magnetic Resonance Imaging, Mammography, Models, Biological, Nonlinear Dynamics, Pressure, Subtraction Technique, Weight-Bearing