P. Hellier, C. Barillot, I. Corouge, B. Gibaud, G. Le Goualher, D.L. Collins, A. Evans, G. Malandain, N. Ayache, G.E. Christensen, H.J. Johnson. Retrospective evaluation of inter-subject brain registration. IEEE Transactions on Medical Imaging, 22(9):1120-1130, February 2003.
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Although numerous methods to register brains of different individuals have been proposed, no work has been done, as far as we know, to evaluate and objectively compare the performances of different nonrigid (or elastic) registration methods on the same database of subjects. In this paper, we propose an evaluation framework, based on global and local measures of the relevance of the registration. We have chosen to focus more particularly on the matching of cortical areas, since intersubject registration methods are dedicated to anatomical and functional normalization, and also because other groups have shown the relevance of such registration methods for deep brain structures. Experiments were conducted using 6 methods on a database of 18 subjects. The global measures used show that the quality of the registration is directly related to the transformation's degrees of freedom. More surprisingly, local measures based on the matching of cortical sulci did not show significant differences between rigid and non rigid methods
Pierre Hellier 
Christian Barillot
Isabelle Corouge
Bernard Gibaud
@article{Hellier03b,
Author = {Hellier, P. and Barillot, C. and Corouge, I. and Gibaud, B. and Le Goualher, G. and Collins, D.L. and Evans, A. and Malandain, G. and Ayache, N. and Christensen, G.E. and Johnson, H.J.},
Title = {{Retrospective evaluation of inter-subject brain registration}},
Journal = {IEEE Transactions on Medical Imaging},
Volume = {22},
Number = {9},
Pages = {1120--1130},
Month = {February},
Year = {2003}
}
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