Abstract
Purpose
This paper is to propose a new framework for medical image registration with large nonrigid deformations, which still remains one of the biggest challenges for image fusion and further analysis in many medical applications.
Method
Registration problem is formulated as to recover a deformation process with the known initial state and final state. To deal with large nonlinear deformations, virtual frames are proposed to be inserted to model the deformation process. A time parameter is introduced and the deformation between consecutive frames is described with a linear affine transformation.
Results
Experiments are conducted with simple geometric deformation as well as complex deformations presented in MRI and ultrasound images. All the deformations are characterized with nonlinearity. The positive results demonstrated the effectiveness of this algorithm.
Conclusion
The framework proposed in this paper is feasible to register medical images with large nonlinear deformations and is especially useful for sequential images.
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Chen, H., Ng, W.S., Shi, D. et al. Image registration based on virtual frame sequence analysis. Int J CARS 2, 127–133 (2007). https://doi.org/10.1007/s11548-007-0121-5
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DOI: https://doi.org/10.1007/s11548-007-0121-5