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<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>Fabio,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>You are right ! The type
of values is unsigned short (DICOM CT scan) -1024 / 1024, so for extract the
skin, the contour value is around -500.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>Thanks for your help !<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>De :</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'> Fabio Meneghini
[mailto:fab.meneghini@gmail.com] <br>
<b><span style='font-weight:bold'>Envoyé :</span></b> vendredi 19 décembre
2008 12:41<br>
<b><span style='font-weight:bold'>À :</span></b> Larcher Aurélie<br>
<b><span style='font-weight:bold'>Objet :</span></b> Re: [vtkusers] Set
the contour value from DicomReader</span></font><o:p></o:p></p>
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12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>..that's pretty weird<br>
I tried the same pipeline you proposed, with vtkContourFilter, and a DICOM
dataset as source, and it worked. <br>
Here's the code I used (in TCL)<br>
<br>
vtkDICOMImageReader DIR <br>
DIR SetDirectoryName "/home/fabio/Scrivania/DICOM/GIFE/ST1/SE9" <br>
DIR Update <br>
set patient [DIR GetPatientName] <br>
puts stdout $patient <br>
set range [eval [eval [eval [DIR GetOutput] GetPointData] GetScalars] GetRange]
<br>
puts stdout $range <br>
<br>
vtkContourFilter skinExtractor <br>
skinExtractor SetInputConnection [DIR GetOutputPort] <br>
skinExtractor SetValue 0 60 <br>
<br>
vtkPolyDataNormals skinNormals <br>
skinNormals SetInputConnection [skinExtractor GetOutputPort] <br>
skinNormals SetFeatureAngle 60.0 <br>
<br>
vtkStripper skinStripper <br>
skinStripper SetInputConnection [skinNormals GetOutputPort] <br>
<br>
vtkPolyDataMapper skinMapper <br>
skinMapper SetInputConnection [skinStripper GetOutputPort] <br>
skinMapper ScalarVisibilityOff <br>
<br>
vtkActor skin <br>
skin SetMapper skinMapper <br>
[skin GetProperty] SetDiffuseColor .6 .49 .25 <br>
[skin GetProperty] SetSpecular .3 <br>
[skin GetProperty] SetSpecularPower 20<br>
<br>
/////////////////<br>
it may be that the value you set for contouring is not good...try to take a
look at the histogram of the images, or simply look at the value range, just
like my script does. <br>
Good luck!<br>
<br>
Fabio <br>
<br>
<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>2008/12/19 Larcher Aurélie <<a href="mailto:aurelie.larcher@imag.fr">aurelie.larcher@imag.fr</a>><o:p></o:p></span></font></p>
<div link=blue vlink=purple>
<div>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>Hi
all,</span></font><o:p></o:p></p>
<p><font size=2 face=Arial><span lang=EN-GB style='font-size:10.0pt;font-family:
Arial'>I try to set contour value to my Dicom Reader in order to generate skin
surface.</span></font><o:p></o:p></p>
<p><font size=2 face=Arial><span lang=EN-GB style='font-size:10.0pt;font-family:
Arial'>When I use filter like vtkMarchingContourFilter or vtkContourFilter with
the contour value 30, there is no result.</span></font><o:p></o:p></p>
<p><font size=2 face="Courier New"><span style='font-size:10.0pt;font-family:
"Courier New"'> </span></font><font size=2
face="Courier New"><span lang=EN-GB style='font-size:10.0pt;font-family:"Courier New"'>vtkDICOMImageReader
*colonneReader = vtkDICOMImageReader::New();</span></font><o:p></o:p></p>
<p><font size=2 face="Courier New"><span lang=EN-GB style='font-size:10.0pt;
font-family:"Courier New"'>
colonneReader->SetDirectoryName("F:/Images/VDH/Dicom/");</span></font><o:p></o:p></p>
<p><font size=2 face="Courier New"><span lang=EN-GB style='font-size:10.0pt;
font-family:"Courier New"'>
</span></font><font size=2 face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New"'>colonneReader->Update() ;</span></font><o:p></o:p></p>
<p><font size=2 face="Courier New"><span style='font-size:10.0pt;font-family:
"Courier New"'> vtkMarchingContourFilter
*surfacePeau = vtkMarchingContourFilter::New();</span></font><o:p></o:p></p>
<p><font size=2 face="Courier New"><span style='font-size:10.0pt;font-family:
"Courier New"'>
surfacePeau->SetInputConnection(colonneReader->GetOutputPort());</span></font><o:p></o:p></p>
<p><font size=2 face="Courier New"><span style='font-size:10.0pt;font-family:
"Courier New"'>
surfacePeau->SetValue(0,30);</span></font><o:p></o:p></p>
<p><font size=2 face=Arial><span lang=EN-GB style='font-size:10.0pt;font-family:
Arial'>Nevertheless, when I use vtkEdgePoints with the same contour value, I
have some result</span></font><o:p></o:p></p>
<p style='text-indent:35.4pt'><font size=2 face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New"'>vtkEdgePoints *surfacePeau =
vtkEdgePoints::New();</span></font><o:p></o:p></p>
<p><font size=2 face="Courier New"><span style='font-size:10.0pt;font-family:
"Courier New"'>
surfacePeau->SetInputConnection(colonneReader->GetOutputPort());</span></font><o:p></o:p></p>
<p><font size=2 face="Courier New"><span style='font-size:10.0pt;font-family:
"Courier New"'>
surfacePeau->SetValue(30);</span></font><o:p></o:p></p>
<p><font size=2 face=Arial><span lang=EN-GB style='font-size:10.0pt;font-family:
Arial'>If I changed the contour value at 200, I obtain the same result with the
3 filters (with different appearance obviously).</span></font><o:p></o:p></p>
<p><font size=2 face=Arial><span lang=EN-GB style='font-size:10.0pt;font-family:
Arial'>Can you tell me what's the problem and how can I generate skin surface
with vtkMarchingContourFilter or vtkContourFilter.</span></font><o:p></o:p></p>
<p><font size=2 face=Arial><span lang=EN-GB style='font-size:10.0pt;font-family:
Arial'>Thanks,</span></font><o:p></o:p></p>
<p><font size=2 face=Arial><span lang=EN-GB style='font-size:10.0pt;font-family:
Arial'>Aurélie</span></font><o:p></o:p></p>
<p><font size=2 face=Arial><span lang=EN-GB style='font-size:10.0pt;font-family:
Arial'> </span></font><o:p></o:p></p>
<p><font size=2 face=Arial><span lang=EN-GB style='font-size:10.0pt;font-family:
Arial'> </span></font><o:p></o:p></p>
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