Spatially Varying Elasticity in Image Registration
S. Kabus and A. Franz and B. Fischer
Methods of Information in Medicine  46  287--291  (2007)

In this paper we are concerned with elastic image registration. Usually, elastic approaches assume constant material parameters and result in a smooth displacement field. However, a constant choice has its shortcomings for images with varying elastic properties, like bones and soft tissue. The proposed method allows for spatially varying material properties.