Open Access
A 3D Statistical Fluid Registration Algorithm
C. Brun,Natasha Lepore,Xavier Pennec,Yi-Yu Chou,Greig I. de Zubicaray,Katie L. McMahon,Margaret J. Wright,James C. Gee,Paul M. Thompson +8 more
- 01 Jan 2010
TL;DR: This paper compares the vector-statistics version of SAFIRA to the non-statistical one and to the widely-used fluid registration, which is based on the Navier-Stokes equation.
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Abstract: In this paper, we further investigate a Statistically-Assisted Fluid Image Registration Algorithm (SAFIRA) that was recently developed in [2]. SAFIRA was built in a Lagrangian framework, which naturally incorporates two types of statistics on shape variations deformation vectors and tensors in the regularization term of the registration. This makes structural brain MRI registrations more accurate and biologically realistic. Here, we add to the understanding of the energetic behavior of the system through looking at its Hamiltonian. Furthermore, we compare the vector-statistics version to the non-statistical one and to the widely-used fluid registration, which is based on the Navier-Stokes equation. For the statistical registration, we use prior information on a training set independent from the dataset to be analyzed. Registration accuracy is measured on a pre-labeled data set for all 3 methods, and we also compute the heritability of brain structure using 46 twin pairs. SAFIRA detected genetic effects more extensively and showed improved registration accuracy compared to the other two algorithms.
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Citations
A new registration method based on Log-Euclidean tensor metrics and its application to genetic studies
C. Brun,Natasha Lepore,Xavier Pennec,Yi-Yu Chou,Agatha D. Lee,G.I. de Zubicaray,Katie L. McMahon,Margaret J. Wright,Marina Barysheva,Arthur W. Toga,Paul M. Thompson +10 more
- 01 Jan 2008
TL;DR: In this paper, the authors used the Log-Euclidean framework to define a new regularizer that is a fluid extension of the Riemannian elasticity, which assures diffeomorphic transformations.
7
Three-Dimensional Superimposition of Craniofacial Structures
Sakshi Katyal,Sharvari Vichare,Shailendra Singh Rana,Payal Maken,Abhishek Gupta +4 more
- 01 Jan 2024
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