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<p><font face="Arial">Hi, just to conclude the problem. It turned
out that 'inside' information is lost on some stage of anatomic
volume processing and the projections was done outside the brain
volume. Filling the 'inside' information using the output of
volume segmentation (brain) </font>solved the problem. Thanks a
lot.<br>
</p>
<pre class="moz-signature" cols="72">--
Mirek Wyczesany
Psychophysiology Lab
Jagiellonian University
Kraków, PL </pre>
<div class="moz-cite-prefix">On 15/01/2021 14:04, Schoffelen, J.M.
(Jan Mathijs) wrote:<br>
</div>
<blockquote type="cite" cite="mid:1C5A2BD9-B3FC-40E0-B4F6-9FB00EF10626@donders.ru.nl">
<pre class="moz-quote-pre" wrap="">Hi and thanks for your suggestions. I'm using mesh based source model prepared with FreeSurfer and downsampled with HCP-workbench. I'm nearly sure that the sources are reconstructed correctly, as they nicely match with Curry results.
The reason I use ft_sourceinterpolate is (if I understand this correctly) to perform group analysis. So I wanted to interpolate sources onto MRI volume and then warp them to a MNI template. After some more investigation I found that my problem is not located in ft_sourceplot, but these strange 'rays' are produced already by ft_sourceinterpolate. I can see high power values outside the brain volume when examining SourceInt.pow variable.
Maybe I'm doing the interpolation wrong, but I couldn't find any appropriate information about required masking in tutorials... If you have any suggestions, I would really appreciate..
All the best,
Mirek
cfg = [];
cfg.parameter = 'pow';
sourceInt = ft_sourceinterpolate(cfg, source , mri_itab_rars);
cfg = [];
cfg.method = 'ortho';
cfg.funparameter = 'pow';
ft_sourceplnt(cfg, sourceInt, mri_itab_rars);
</pre>
</blockquote>
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