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<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;mso-fareast-language:EN-US">Hi Jan<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;mso-fareast-language:EN-US">If you are using a standard EEG layout, then it is not problem to use a template MRI and source space (beyond the inherent discrepancy between the template anatomy and
the actual subject’s anatomy). There is a short tutorial on using templates for source reconstruction here:
<a href="https://www.fieldtriptoolbox.org/template/sourcemodel/">https://www.fieldtriptoolbox.org/template/sourcemodel/</a><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;mso-fareast-language:EN-US">If you got FieldTrip from Git, then you already should have a lot of templates that you can use right out of the box. You can see them here:
<a href="https://github.com/fieldtrip/fieldtrip/tree/master/template">https://github.com/fieldtrip/fieldtrip/tree/master/template</a><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;mso-fareast-language:EN-US">The only issues is to make sure that your EEG layout and the template MRI are in the same coordinate system. That you can find how to do on the regular source reconstruction
tutorials, e.g.: <a href="https://www.fieldtriptoolbox.org/tutorial/headmodel_eeg_bem/#automatic-alignment">
https://www.fieldtriptoolbox.org/tutorial/headmodel_eeg_bem/#automatic-alignment</a><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;mso-fareast-language:EN-US">Best regards<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="font-size:11.0pt;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="font-size:12.0pt;color:black">Fra:
</span></b><span style="font-size:12.0pt;color:black">fieldtrip <fieldtrip-bounces@science.ru.nl> på vegne af Jan Ostrowski via fieldtrip <fieldtrip@science.ru.nl><br>
<b>Dato: </b>mandag, 21. marts 2022 kl. 10.07<br>
<b>Til: </b>fieldtrip@science.ru.nl <fieldtrip@science.ru.nl><br>
<b>Cc: </b>Jan Ostrowski <j.ostrowski@uke.de><br>
<b>Emne: </b>[FieldTrip] Using default head and source models for source reconstruction<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt">Hi there,<br>
<br>
my name is Jan Ostrowski and I am working on crossmodal memory. I <br>
conducted a study using a 64-Channel EEG setup, and would like to <br>
explore the data using Fieldtrip's source reconstruction functionality. <br>
However, due to my study design, I did not acquire individual MRI images <br>
for solving the forward problem.<br>
<br>
I'd like to know if it is possible to use some default templates for <br>
that, as all tutorials assume that one has MRI images to work with. If <br>
it is possible, then what templates should I use and how would I <br>
implement it? As in: What steps of the process described in the <br>
tutorials could I skip?<br>
<br>
I understand that using default templates will make the results of the <br>
source reconstruction less precise, and I am well aware that one should <br>
be cautious when interpreting that. This is, however, going to be an <br>
additional, exploratory analysis.<br>
<br>
Any help with this is greatly appreciated!<br>
<br>
Best,<br>
Jan Ostrowski<br>
<br>
-- <br>
Jan Ostrowski, M.Sc.<br>
Department of Systems Neuroscience<br>
University Medical Center Hamburg-Eppendorf<br>
Martinistr. 52<br>
Building W34, Room 320b<br>
D-20246 Hamburg, Germany<br>
<br>
--<br>
<br>
_____________________________________________________________________<br>
<br>
Universitätsklinikum Hamburg-Eppendorf; Körperschaft des öffentlichen Rechts; Gerichtsstand: Hamburg | www.uke.de<br>
Vorstandsmitglieder: Prof. Dr. Burkhard Göke (Vorsitzender), Joachim Prölß, Prof. Dr. Blanche Schwappach-Pignataro, Marya Verdel<br>
_____________________________________________________________________<br>
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