ISSN:
1573-1405
Keywords:
medical imaging
;
adaptive meshes
;
non-rigid motion
;
differential geometry
;
finite element method
Source:
Springer Online Journal Archives 1860-2000
Topics:
Computer Science
Notes:
Abstract We describe a new method for computing the displacement vector field in time sequences of 2D or 3D images (4D data). The method is energy-minimizing on the space of correspondence functions; the energy is split into two terms, with one term matching differential singularities in the images, and the other constraining the regularity of the field. In order to reduce the computational time of the motion estimation, we use an adaptive image mesh, the resolution of which depends on the value of the gradient intensity. We solve numerically the minimization problem with the finite element method which gives a continuous approximation of the solution. We present experimental results on synthetic data and on medical images and we show how to use these results for analyzing cardiac deformations.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1007932523504
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