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Title page for ETD etd-12062007-150744


Type of Document Master's Thesis
Author Ong, Rowena E
URN etd-12062007-150744
Title PDE-Based Non-rigid Registration of Breast Surfaces
Degree Master of Science
Department Biomedical Engineering
Advisory Committee
Advisor Name Title
Michael I. Miga Committee Chair
Robert L. Galloway Committee Member
Keywords
  • Breast -- Cancer -- Diagnosis
  • Stereotaxic techniques
  • point correspondence
  • feature-based registration
  • model-based registration
  • target registration error
  • surface registration
  • Breast -- Imaging
Date of Defense 2007-12-07
Availability unrestricted
Abstract
Recent advances in breast cancer imaging have generated new ways to characterize the disease, and many of these novel analysis techniques require the registration of breast surfaces during a non-rigid deformation. In this paper, a semi-automated method to register breast surfaces before and after a non-rigid deformation is presented. This method involves solving the Laplace or diffusion equations over the undeformed and deformed breast surfaces, yielding potential fields and isocontours that are used to establish surface correspondence. The proposed partial differential equation (PDE)-based registration method is compared to a thin-plate spline (TPS) interpolation of surface displacements tracked by fiducial markers. These registration methods are tested on a realistic finite element simulation of a breast compression, a breast phantom, and on a clinical data set. The results indicate that the TPS registration technique is the most accurate; however, if fiducial information is not available, the PDE-based registration methods may be viable alternatives. The PDE-based and TPS registration methods have the potential to be used by analyses requiring the non-rigid registration of breast surfaces before and after compression, and both have been used in Modality-Independent Elastography (MIE) to determine the boundary conditions needed for elasticity imaging.
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