Hi,<br><br>I was wondering if someone could tell me what parameters I should tweak to increase the accuracy of warping using<br>Diffeomorphic Demons Using ITK's Finite Difference Solver Hierarchy. I have been playing blindly with the number of iterations and the number of multi-resolution iterations, the maximum step length and the sigma's. If spomeone could explain how lowering or raising the values of these parameters affect the accuracy of the warping I would greatly appreciate it. I am using the warping to map seed points in brain ventricles from one 3D dicom image which I am using as a template to map seed points to sveral other subjects' ventricles which are also other dicom images and I am having trouble mapping s4eeds accurately within the thin temporal horns. The seed points in the ventricle body map well.<br>
<br>Thank you for your time,<br>and Happy Easter!<br><br>John<br clear="all"><br>-- <br><div>John Drozd<br></div>
<div>Post-Doctoral Fellow, Robarts Research Institute</div>
<div>The University of Western Ontario</div>
<div>London, ON, Canada<br></div>
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