typos are corrected below in italics:<br><br><div class="gmail_quote">On Thu, Apr 21, 2011 at 6:17 PM, John Drozd <span dir="ltr"><<a href="mailto:john.drozd@gmail.com">john.drozd@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
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 <i>someone </i>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 <i>several</i> other subjects' ventricles which are also other dicom images and I am having trouble mapping <i>seeds</i> 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"><font color="#888888"><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>
<br>
</font></blockquote></div><br><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>
<br>