[Insight-users] The Insight Journal-New Submission

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Hello,
A new submission has been added to the Insight Journal.

Title: Non-rigid Groupwise Registration using B-Spline Deformation Model
Author(s): Balci, Serdar K.; Golland, Polina; Wells, William M.
Abstract: 
In this work, 
we extend a previously demonstrated entropy based groupwise registration method
to include a non-rigid deformation model based on B-splines. 
We describe an open source implementation of the groupwise registration algorithm 
using the Insight Toolkit ITK.
We provide the source code, parameters, input and
output data that we used for validation.


We describe an efficient implementation of the algorithm 
by using a stochastic optimization scheme embedded in a multi-resolution setting.
The objective function is optimized using gradient descent algorithm combined
with line search for the step size.
The derivative of the objective function is evaluated efficiently by computing Jacobian of 
B-spline deformation field locally.


We demonstrate the algorithm in application to different imaging modalities
including proton density, FA, T1 and T2 MR images. 
We validate the algorithm on synthetic datasets varying from 2 to 30 images
by recovering randomly applied affine and B-spline transforms.

Download the paper at: http://hdl.handle.net/1926/568
Review the paper at: http://insight-journal.org

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