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<DIV><FONT face=Arial size=2>Hi Nick,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>if I see this the right way, the only way to
achieve this kind of meshing would</FONT></DIV>
<DIV><FONT face=Arial size=2>be to use the ITK - Mesh and create a mesh - input
file from this mesh, which the FEM - Filter </FONT></DIV>
<DIV><FONT face=Arial size=2>can read, right?</FONT></DIV>
<DIV><FONT face=Arial size=2>I didn't have a look at the itk mesh yet, but is it
appropriate for tatrahedral mesh generation which</FONT></DIV>
<DIV><FONT face=Arial size=2>can be used to create a fem - mesh?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Further question:</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>What is the concrete function of these lines (taken
from software guide), why two different</FONT></DIV>
<DIV><FONT face=Arial size=2>membrane - types, which one is actually
created?:</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2> typedef
itk::fem::Element3DC0LinearHexahedronMembrane
Element3DType;<BR> typedef
itk::fem::Element3DC0LinearTetrahedronMembrane
Element3DType2;<BR></DIV></FONT>
<DIV><FONT face=Arial size=2> {<BR>// Software Guide :
BeginCodeSnippet<BR> Element3DType::LoadImplementationFunctionPointer fp =
<BR>
&itk::fem::ImageMetricLoadImplementation<ImageLoadType>::ImplementImageMetricLoad;<BR>
DispatcherType::RegisterVisitor((ImageLoadType*)0,fp);<BR>// Software
Guide : EndCodeSnippet <BR> }<BR> {<BR>
Element3DType2::LoadImplementationFunctionPointer fp =<BR>
&itk::fem::ImageMetricLoadImplementation<ImageLoadType>::ImplementImageMetricLoad;<BR>
DispatcherType2::RegisterVisitor((ImageLoadType*)0,fp);<BR> }</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Regards,</FONT></DIV>
<DIV><FONT face=Arial size=2>Markus</FONT></DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=ntustison@gmail.com href="mailto:ntustison@gmail.com">Nicholas
Tustison</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=m.weigert@fz-juelich.de
href="mailto:m.weigert@fz-juelich.de">Markus Weigert</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Cc:</B> <A title=insight-users@itk.org
href="mailto:insight-users@itk.org">insight-users@itk.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Monday, June 12, 2006 5:41 PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [Insight-users] Adaptive
Meshing for FEM - Registration</DIV>
<DIV><FONT face=Arial size=2></FONT><FONT face=Arial size=2></FONT><FONT
face=Arial size=2></FONT><BR></DIV>
<DIV>Hi Markus,</DIV>
<DIV><FONT face=Arial size=2></FONT><FONT face=Arial size=2></FONT><BR
class=khtml-block-placeholder></DIV>
<DIV>A straightforward conversion between an ITK mesh and a FEM mesh is
non-existent. I'm reworking the FEM mesh class now and maybe I'll come
up with something but until then...</DIV>
<DIV><FONT face=Arial size=2></FONT><FONT face=Arial size=2></FONT><BR
class=khtml-block-placeholder></DIV>
<DIV>The current FEM framework allows for an external mesh to be brought into
the FEM project but that, in addition to the default rectilinear mesh that is
created when no external mesh is specified, is the extent of the current FEM
library meshing capabilities. </DIV>
<DIV><BR class=khtml-block-placeholder></DIV>
<DIV>Nick Tustison</DIV>
<DIV><BR class=khtml-block-placeholder></DIV><BR>
<DIV>
<DIV>On Jun 12, 2006, at 11:32 AM, Markus Weigert wrote:</DIV><BR
class=Apple-interchange-newline>
<BLOCKQUOTE type="cite">
<DIV><FONT face=Arial size=2>Hi all,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>in the insight book ("Insight into Images")
from Terry S. Yoo,</FONT></DIV>
<DIV><FONT face=Arial size=2>there is a nice example of adaptive
lung meshing (page 331).</FONT></DIV>
<DIV><FONT face=Arial size=2>My question is, how can such a meshing be
obtained with ITK </FONT><FONT face=Arial size=2>in 3D?</FONT></DIV>
<DIV><FONT face=Arial size=2>I suppose, one can use the ITK - Mesh framework
for this task,</FONT></DIV>
<DIV><FONT face=Arial size=2>but the ITK Mesh would need to be casted to a
FEM - Mesh.</FONT></DIV>
<DIV><FONT face=Arial size=2>Can this casting be done in a straight forward
way, or is it more complicated?</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Also, this would be interesting because one
could start to segment an image</FONT></DIV>
<DIV><FONT face=Arial size=2>and mesh individual surfaces to model each
tissue with different elasticity.</FONT></DIV>
<DIV><FONT face=Arial size=2>Any idears on this???</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Regards,</FONT></DIV>
<DIV><FONT face=Arial size=2>Markus</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
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