[FieldTrip] beamformer on EEG data

[Azeez Adebimpe]

Hi Jia,

There  may be problem in viewing if there is no issues or warning in
headmodel construction.
Can you use view in fieldtrip first  with* ft_sourceplot* after  or before
interpolation to compare  with micron?

Azeez



On Fri, Sep 4, 2015 at 5:17 PM, Wu, Jia <jia.wu at yale.edu> wrote:

> Azeez,
>
> Thanks for getting back to me. Yes I used the same MRI. But since you
> asked, I went back and double checked all the steps and put together the
> code as below. I used MRIcro to looked at the source output. The output
> still doesn't look quite like a brain: http://imgur.com/Kn3sbgm.
>
> Code is here:
> https://github.com/sindhri/try_fieldtrip/blob/master/run_data_sample_sent.m
>
> sample data here: (sorry the link expires in a week)
> download password:code
>
> https://files.yale.edu/public_download?shareId=40d6f4c574599585eecaef773c7b927e
>
> Thank you very much for your help!
>
> best,
> -jia
> ------------------------------
> *From:* fieldtrip-bounces at science.ru.nl [fieldtrip-bounces at science.ru.nl]
> on behalf of Azeez Adebimpe [azeez.adebimpe5 at gmail.com]
> *Sent:* Tuesday, September 01, 2015 5:28 PM
> *To:* FieldTrip discussion list
> *Subject:* Re: [FieldTrip] beamformer on EEG data
>
> Hi Jia,
>
> Do you interpolate on the same MRI you used for  construct headmodel?
> Can you post your matlab code?
>
> Azeez
>
> On Tue, Sep 1, 2015 at 11:20 PM, Wu, Jia <jia.wu at yale.edu> wrote:
>
>> Hi,
>>
>> Here is the most problematic part of my analysis.
>>
>> When I did not align electrode positions with headmodel, I was able to
>> get interpolated source signal that resembled a brain.
>> http://imgur.com/bZkGqsk
>> <https://urldefense.proofpoint.com/v2/url?u=http-3A__imgur.com_bZkGqsk&d=AwMFaQ&c=-dg2m7zWuuDZ0MUcV7Sdqw&r=9ehCplyXHP0-m9ayYv1FOg&m=8aDZNzQKqFKPrBsVo7s9Bcw2_W3DVOh8Z_01ATDCjso&s=Pq7HZiQsFtOT9Nl4SPperxlyaBByDsKFHyM5S32q0DE&e=>
>>
>> However if I managed to align electrode positions with headmodel, (then
>> build the correct leadfield), the interpolated source did not resemble a
>> brain.
>> http://imgur.com/XQMyiQy
>> <https://urldefense.proofpoint.com/v2/url?u=http-3A__imgur.com_XQMyiQy&d=AwMFaQ&c=-dg2m7zWuuDZ0MUcV7Sdqw&r=9ehCplyXHP0-m9ayYv1FOg&m=8aDZNzQKqFKPrBsVo7s9Bcw2_W3DVOh8Z_01ATDCjso&s=2nXDThp6Y65bF1-enB75g9fYxxFO6z3poQIyctjGq-Y&e=>
>>
>> Anybody has a clue what was going on?
>>
>> best,
>> -jia
>> ------------------------------
>> *From:* fieldtrip-bounces at science.ru.nl [fieldtrip-bounces at science.ru.nl]
>> on behalf of Wu, Jia [jia.wu at yale.edu]
>> *Sent:* Monday, August 31, 2015 4:33 PM
>> *To:* FieldTrip discussion list
>> *Subject:* [FieldTrip] beamformer on EEG data
>>
>> Hi,
>> I'm new to the community and fieldtrip. I'm trying to use beamformer to
>> do oscillatory source localization on some EEG data.
>>
>> I thought I stumbled upon some tutorial specific on this top on the
>> fieldtrip wiki, but I couldn't find it any more. Most source localization
>> materials seem to be for MEG data. And I've been confused about the steps
>> to build a correct headmodel, sourcemodel, leadfield based on only EEG
>> information.
>>
>> Anybody has a quick link to the tutorial? If such tutorial doesn't exist
>> I will email the group about my specific questions.
>>
>> best,
>> -jia
>>
>> _______________________________________________
>> fieldtrip mailing list
>> fieldtrip at donders.ru.nl
>> http://mailman.science.ru.nl/mailman/listinfo/fieldtrip
>> <https://urldefense.proofpoint.com/v2/url?u=http-3A__mailman.science.ru.nl_mailman_listinfo_fieldtrip&d=AwMFaQ&c=-dg2m7zWuuDZ0MUcV7Sdqw&r=9ehCplyXHP0-m9ayYv1FOg&m=8aDZNzQKqFKPrBsVo7s9Bcw2_W3DVOh8Z_01ATDCjso&s=SDcXU6EPMuaMwjujbNEU9iuxnVYcl7-xguabqlYxQSE&e=>
>>
>
>
> _______________________________________________
> fieldtrip mailing list
> fieldtrip at donders.ru.nl
> http://mailman.science.ru.nl/mailman/listinfo/fieldtrip
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.science.ru.nl/pipermail/fieldtrip/attachments/20150904/238fe193/attachment-0002.html>