Donald and Alexandre,<br><br>Thanks for the suggestions. I was indeed able to find another run of this same participant that still has the digitization data. I imported the raw data into MNE and then used that, rather than my original .fif file, for loading digitization points when I did co-registration; then I saved the co-registration, renamed it so that it matched what it would have been if I used the original file (subj006_raw-trans.fif), and then tried doing forward and inverse solutions. At mne_setup_forward_solution I got the following error:<br>
<br>MEG -> head coordinate transformation not found<br><br>I haven't gotten that error with other subjects so I assume it must have something to do with my messing around with the filenames? I tried changing the filenames at several different stages but still keep getting the error. Is there a better way to do this? (For instance, Alexandre, if I understand your suggestion right, should I be adding the digitization points from the good .fif file directly into the bad _raw.fif file and then using that one to load digitization data when I do coregistration?)<br>
<br>Thanks again,<br>Steve<br><br><br><div class="gmail_quote">On Thu, Mar 8, 2012 at 10:55 AM, Alexandre Gramfort <span dir="ltr"><<a href="mailto:gramfort@nmr.mgh.harvard.edu">gramfort@nmr.mgh.harvard.edu</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi Stephen,<br>
<br>
if you have the digitization points in one of the fif files for this<br>
particular subject than we can add them to a raw file or you can load<br>
them directly in mne_analyze. Otherwise I'm afraid you'll have to do<br>
the coregistration only using the 3 fiducials which is fairly<br>
imprecise.<br>
<br>
Alex<br>
<div class="HOEnZb"><div class="h5"><br>
On Thu, Mar 8, 2012 at 4:25 PM, Stephen Politzer-Ahles<br>
<<a href="mailto:politzerahless@gmail.com">politzerahless@gmail.com</a>> wrote:<br>
> Hi Donald,<br>
><br>
> Thanks for the suggestion. I was able to do this using mne_show_fiff and<br>
> there are indeed differences in the tags. I've attached text copies of the<br>
> output of mne_show_fiff for the subject I'm getting the error for (subj006)<br>
> and a good one (subj023). The difference seems to be that the bad subject's<br>
> fiff is missing these tags that are present in other subjects' files:<br>
><br>
> 104 = { 107 = isotrak<br>
> 213 = dig. point [5]<br>
> 105 = } 107 = isotrak<br>
> 104 = { 109 = HPI result<br>
> 213 = dig. point [3]<br>
> 222 = transform [2]<br>
> 105 = } 109 = HPI result<br>
><br>
> Is there a way to add these tags into the .fif file for that subject? I<br>
> don't know why they're missing (but I have e-mailed the person who runs our<br>
> MEG machine to see if she can tell).<br>
><br>
> Thanks again,<br>
> Steve<br>
><br>
><br>
> On Tue, Mar 6, 2012 at 2:54 PM, Krieger, Donald N. <<a href="mailto:kriegerd@upmc.edu">kriegerd@upmc.edu</a>><br>
> wrote:<br>
>><br>
>> Hi Steve,<br>
>><br>
>> You might just look at the tags in the file using the Elekta tool:<br>
>> show_fiff . There's probably an mne or mne matlab toolbox tool which<br>
>> enables this too.<br>
>><br>
>> Don<br>
>><br>
>> Don Krieger, Ph.D., D.ABNM<br>
>> Department of Neurological Surgery<br>
>> University of Pittsburgh<br>
>> <a href="tel:%28412%29648-9654" value="+14126489654">(412)648-9654</a><br>
>> ________________________________<br>
>> From: <a href="mailto:mne_analysis-bounces@nmr.mgh.harvard.edu">mne_analysis-bounces@nmr.mgh.harvard.edu</a><br>
>> [<a href="mailto:mne_analysis-bounces@nmr.mgh.harvard.edu">mne_analysis-bounces@nmr.mgh.harvard.edu</a>] on behalf of Stephen<br>
>> Politzer-Ahles [<a href="mailto:politzerahless@gmail.com">politzerahless@gmail.com</a>]<br>
>> Sent: Tuesday, March 06, 2012 3:51 PM<br>
>> To: <a href="mailto:mne_analysis@nmr.mgh.harvard.edu">mne_analysis@nmr.mgh.harvard.edu</a><br>
>> Subject: [Mne_analysis] No Isotrak data found in (raw .fif file)<br>
>><br>
>> Hello MNEers,<br>
>><br>
>> While doing MRI-MEG co-registration, for one particular subject when I<br>
>> open mne_analyze and try to Load Digitizer Data from the raw .fif file, I<br>
>> get this error:<br>
>><br>
>> No Isotrak data found in (the name of the .fif file)<br>
>><br>
>> I haven't gotten this error for any of my other subjects, and I processed<br>
>> them all the same way using a batch. Just now I tried re-doing some of the<br>
>> processing for this subject (epoching, artifact rejection, and filtering had<br>
>> already been done in CTF, but I redid the import to .fif, averaging, and<br>
>> noise covariance matrix), and still got the same problem.<br>
>><br>
>> Does anyone have any idea what might be causing this error and how to fix<br>
>> it?<br>
>><br>
>> Best,<br>
>> Steve Politzer-Ahles<br>
>><br>
>> --<br>
>> Stephen Politzer-Ahles<br>
>> University of Kansas<br>
>> Linguistics Department<br>
>> <a href="http://www.linguistics.ku.edu/" target="_blank">http://www.linguistics.ku.edu/</a><br>
>><br>
>> _______________________________________________<br>
>> Mne_analysis mailing list<br>
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>> <a href="https://mail.nmr.mgh.harvard.edu/mailman/listinfo/mne_analysis" target="_blank">https://mail.nmr.mgh.harvard.edu/mailman/listinfo/mne_analysis</a><br>
>><br>
>><br>
>> The information in this e-mail is intended only for the person to whom it<br>
>> is<br>
>> addressed. If you believe this e-mail was sent to you in error and the<br>
>> e-mail<br>
>> contains patient information, please contact the Partners Compliance<br>
>> HelpLine at<br>
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><br>
><br>
><br>
> --<br>
> Stephen Politzer-Ahles<br>
> University of Kansas<br>
> Linguistics Department<br>
> <a href="http://www.linguistics.ku.edu/" target="_blank">http://www.linguistics.ku.edu/</a><br>
><br>
> _______________________________________________<br>
> Mne_analysis mailing list<br>
> <a href="mailto:Mne_analysis@nmr.mgh.harvard.edu">Mne_analysis@nmr.mgh.harvard.edu</a><br>
> <a href="https://mail.nmr.mgh.harvard.edu/mailman/listinfo/mne_analysis" target="_blank">https://mail.nmr.mgh.harvard.edu/mailman/listinfo/mne_analysis</a><br>
><br>
><br>
> The information in this e-mail is intended only for the person to whom it is<br>
> addressed. If you believe this e-mail was sent to you in error and the<br>
> e-mail<br>
> contains patient information, please contact the Partners Compliance<br>
> HelpLine at<br>
> <a href="http://www.partners.org/complianceline" target="_blank">http://www.partners.org/complianceline</a> . If the e-mail was sent to you in<br>
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> but does not contain patient information, please contact the sender and<br>
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> dispose of the e-mail.<br>
><br>
</div></div></blockquote></div><br><br clear="all"><br>-- <br>Stephen Politzer-Ahles<br>University of Kansas<br>Linguistics Department<br><a href="http://www.linguistics.ku.edu/">http://www.linguistics.ku.edu/</a><br>