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Deformable templates using large deformation kinematics
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MICCAI'10 Proceedings of the 13th international conference on Medical image computing and computer-assisted intervention: Part II
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SIAM Journal on Imaging Sciences
Simple geodesic regression for image time-series
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Diffeomorphic directly manipulated free-form deformation image registration via vector field flows
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Diffeomorphic cardiac motion estimation with anisotropic regularization along myofiber orientation
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Large deformation diffeomorphic registration of diffusion-weighted images
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Diffeomorphic spectral matching of cortical surfaces
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Spectral Log-Demons: Diffeomorphic Image Registration with Very Large Deformations
International Journal of Computer Vision
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This paper examine the Euler-Lagrange equations for the solution of the large deformation diffeomorphic metric mapping problem studied in Dupuis et al. (1998) and Trouvé (1995) in which two images I 0, I 1 are given and connected via the diffeomorphic change of coordinates I 0驴驴驴1=I 1 where 驴=驴1 is the end point at t= 1 of curve 驴 t , t驴[0, 1] satisfying .驴 t =v t (驴 t ), t驴 [0,1] with 驴0=id. The variational problem takes the form $$\mathop {\arg {\text{m}}in}\limits_{\upsilon :\dot \phi _t = \upsilon _t \left( {\dot \phi } \right)} \left( {\int_0^1 {\left\| {\upsilon _t } \right\|} ^2 {\text{d}}t + \left\| {I_0 \circ \phi _1^{ - 1} - I_1 } \right\|_{L^2 }^2 } \right),$$ where 驴v t驴 V is an appropriate Sobolev norm on the velocity field v t(·), and the second term enforces matching of the images with 驴·驴L 2 representing the squared-error norm.In this paper we derive the Euler-Lagrange equations characterizing the minimizing vector fields v t, t驴[0, 1] assuming sufficient smoothness of the norm to guarantee existence of solutions in the space of diffeomorphisms. We describe the implementation of the Euler equations using semi-lagrangian method of computing particle flows and show the solutions for various examples. As well, we compute the metric distance on several anatomical configurations as measured by 驴0 1驴v t驴 V dt on the geodesic shortest paths.