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<div style="direction: ltr;font-family: Tahoma;color: #000000;font-size: 10pt;">Helen,
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<div>What a coincident. I'm also working on source analysis on EEG data using GSN HydroCel 128. I had a post a couple weeks ago about later steps. But I did get the alignment to work. The picture you posted looked like the status before the alignment. So i
suspect that alignment did not happen. </div>
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<div>I'm not sure whether you have noticed it, but the fiducial positions in elec location file were called '<font size="2">FidNz', 'FidT9', 'FidT10', instead of <span style="text-align: justify; white-space: pre-wrap; background-color: rgb(247, 249, 250);">'Nz','LPA','RPA'
as in the tutorial. So they need to be changed. Then the alignment should work.</span></font></div>
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<div style="text-align: justify;"><font size="2"><span style="white-space: pre-wrap; background-color: rgb(247, 249, 250);">best,</span></font></div>
<div style="text-align: justify;"><font size="2"><span style="white-space: pre-wrap; background-color: rgb(247, 249, 250);">-jia</span></font></div>
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<div id="divRpF921050" style="direction: ltr;"><font face="Tahoma" size="2" color="#000000"><b>From:</b> fieldtrip-bounces@science.ru.nl [fieldtrip-bounces@science.ru.nl] on behalf of Helen Wieffering [helen.wieffering@gmail.com]<br>
<b>Sent:</b> Monday, September 14, 2015 4:46 PM<br>
<b>To:</b> FieldTrip discussion list<br>
<b>Subject:</b> [FieldTrip] Aligning electrodes to template head model<br>
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<div>Hello all,<br>
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I have a quick question on aligning electrodes to the standard_bem headmodel, which I downloaded from the FT server.
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<div>Namely, are the standard_mri and the standard_bem in the same coordinate system? I assumed this would be so, since one was developed from the other. But when I try to align my electrodes to the standard_bem volume using fiducial positions from the standard_mri,
I get very strange results: (image below and attached)<br>
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<img alt="Inline image 1" src="cid:ii_14fcd98ad69b9786" style="margin-right:0px" height="251" width="334"> <br>
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I'm using a GSN HydroCel 128 Cap, and my elec structure contains the fiducial positions relative to the electrodes.
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I've been following the tutorial at <a href="https://urldefense.proofpoint.com/v2/url?u=http-3A__www.fieldtriptoolbox.org_tutorial_headmodel-5Feeg&d=AwMFaQ&c=-dg2m7zWuuDZ0MUcV7Sdqw&r=9ehCplyXHP0-m9ayYv1FOg&m=wNRiA8CLR4Y1ZrEaTkTaIoVaUczL5TYuWIx6FyQDphg&s=LjU77qpw8I7LnSHIEQrNIB0R0YLrutfAEtjjOMjBys0&e=" target="_blank">
http://www.fieldtriptoolbox.org/tutorial/headmodel_eeg</a> and would like to follow the steps under 'Automatic Alignment', but as I said: pulling the fiducial positions from the standard_mri seems to not work with the tutorial steps.<br>
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Any help is appreciated - thanks in advance!<br>
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<div>Helen Wieffering<br>
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<div>Bowdoin College<br>
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