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MICCAI
2005
Springer

Interpolation Artefacts in Non-rigid Registration

9 years 9 months ago
Interpolation Artefacts in Non-rigid Registration
Voxel based non-rigid registration of images involves finding a similarity maximising transformation that deforms a source image to the coordinate system of a target image. In order to do this, interpolation is required to estimate the source intensity values corresponding to transformed target voxels. These interpolated source intensities are used when calculating the similarity measure being optimised. In this work, we compare the extent and nature of artefactual displacements produced by voxel based non-rigid registration techniques for different interpolators and investigate their relationship to image noise and global transformation error. A per-voxel similarity gradient is calculated and the resulting vector field is used to characterise registration artefacts for each interpolator. Finally, we show that the resulting registration artefacts can generate spurious volume changes for image pairs with no expected volume change.
Paul Aljabar, Joseph V. Hajnal, Richard G. Boyes,
Added 15 Nov 2009
Updated 15 Nov 2009
Type Conference
Year 2005
Where MICCAI
Authors Paul Aljabar, Joseph V. Hajnal, Richard G. Boyes, Daniel Rueckert
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