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Thank you so much for your reply Arjen,
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<div>I was wondering if there is there any solution in the interface where we can automatically exclude some unwanted point? In the segmentation process? Or in a later process? When I change the threshold I get an error message concerning the final steps in
creating the head model.</div>
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<div>Isaiah Smith <br>
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<div>On Jul 14, 2014, at 2:46 PM, Stolk, A. (Arjen) <<a href="mailto:a.stolk@fcdonders.ru.nl">a.stolk@fcdonders.ru.nl</a>> wrote:</div>
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<div style="font-family: 'Times New Roman'; font-size: 12pt;">Hi Isaiah,<br>
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It could be that your problem is caused by your structural scan containing voxels outside the head but with levels of intensity falling in the range of that attributed to, say, csf. One way to check is by plotting the respective segmented brain mask, e.g.<span class="Apple-converted-space"> </span><br>
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mri.pow = seg.csf<br>
cfg.funparameter = 'pow'<br>
ft_sourceplot(cfg,mri)<br>
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You could then try and manually include certain voxels by playing with the inclusion threshold (e.g. set seg.csf with voxelvalues smaller than .99 to 0). This would allow to work around that problem, unless those voxels have exactly the same intensity as csf.<br>
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Hope this helps narrowing the origin of your problem,<br>
Arjen<br>
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<b>Van:<span class="Apple-converted-space"> </span></b>"Isaiah C. Smith" <<a href="mailto:Isaiah.C.Smith.17@dartmouth.edu">Isaiah.C.Smith.17@dartmouth.edu</a>><br>
<b>Aan:<span class="Apple-converted-space"> </span></b><a href="mailto:fieldtrip@science.ru.nl">fieldtrip@science.ru.nl</a><br>
<b>Verzonden:<span class="Apple-converted-space"> </span></b>Maandag 14 juli 2014 23:28:59<br>
<b>Onderwerp:<span class="Apple-converted-space"> </span></b>[FieldTrip] Editing Vertices of Scalp Manually or Automatically<br>
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Hello Everyone,
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<div>I am having a problem with noise appearing in my volume conduction model. There are a few horn-like images on the head, and a cluster of vertices in the area where a neck would normally appear but the MRI was only of the upper half of someone's head so
it should not be appearing either. I am running into a wall when I try to edit manually because the data so large I cannot view it. Please, I have been trying to fix this for a while does anyone have any ideas on how to get rid of these extraneous points:
whether manually or by shifting parameters in the segmentation process? Your help would be extremely helpful and greatly appreciated.</div>
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<div>This is an image of the problem described.</div>
<div><span><Screen Shot 2014-07-14 at 2.21.48 PM.png></span></div>
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<div>Kind Regards,</div>
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<div>Isaiah</div>
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<div>***************************</div>
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<div style="font-family: Tahoma; font-size: 13px; background-color: rgb(255, 255, 255);">
<font face="Arial"><i>Isaiah Smith ( Dartmouth Undergraduate)</i></font></div>
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<i style="font-family: Arial;">UCLA California NanoSystems Institute Summer Intern</i></div>
<div style="font-family: Tahoma; font-size: 13px; background-color: rgb(255, 255, 255);">
<i style="font-family: Arial;">University of California Los Angeles</i></div>
<div style="background-color: rgb(255, 255, 255);"><i><font face="Arial" size="2">Dr. Wentai Liu’s Biomimetics Lab</font></i></div>
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<i style="font-family: Arial;">Rm 5311</i></div>
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--<span class="Apple-converted-space"> </span><br>
<div><span name="x"></span>Donders Institute for Brain, Cognition and Behaviour<br>
Centre for Cognitive Neuroimaging<br>
Radboud University Nijmegen<br>
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Email: <a href="mailto:a.stolk@donders.ru.nl">a.stolk@donders.ru.nl</a><br>
Phone: +31(0)243 68294<br>
Web: <a href="http://www.arjenstolk.nl/">www.arjenstolk.nl</a><span name="x"></span><br>
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