4D data reading

[Gopakumar Venugopalan]

Dear Almu (that is a nice name!) thank you  Rob Oostenveld, Christian
Weinbruch and Arno (EEGLAB) may be the ones who can make it work for
the other users. There was also a discussion about whether the systems
were using third order gradiometers and/or magnetometers as the
reference. There are mail postings in that thread.
Everyone: I apologize for the typos in my hastily composed response
earlier.
regards
gopa


Quoting Almudena Capilla <a.capilla at PSY.GLA.AC.UK>:

> Dear Gopa,
>
> I have got a template for the 4D - 148 channels system. I could give
> it to
> the Fieldtrip developers if this is helpful for other users of this
> system.
>
> Best,
> Almu
>
> -----Original Message-----
> From: FieldTrip discussion list [mailto:FIELDTRIP at NIC.SURFNET.NL] On
> Behalf
> Of Gopakumar Venugopalan
> Sent: 06 October 2008 13:22
> To: FIELDTRIP at NIC.SURFNET.NL
> Subject: Re: [FIELDTRIP] 4D data reading
>
> Hello everyone, I have been wrestling with these problems for a while
>
> too.
> Here is what I found: Fieldtrip/EEGLAB will read neuroscan files
> (.avg,
> and .eeg), and will read raw data (e,..)from 4D.
> I believe that EEGLAB/Fieldtrip may not have a template for the 148-
> Channel system co-ordinates. Christian and Don Rojas created one for
> me
> in early April this year.
> A FIF export from the 4D system may also solve this problem. Stephen
>
> Moratti helped me with this a while a ago. It puts out three
> files .xyz, .4D and the original e,.. file. But, if the .xyz file
> which
> has coordinates for 148 channels does not match with the template,
> then
> the data will not load. I think for one may have to load a create a
> 148
> channel template for this purpose. This is my experience with EEGLAB,
>
> and I think that they underlying engine is the same for both EEGLAB
> and
> Fieldtrip
> Then again, I may be completely wrong about everything except the
> templates that were created for me.
> regards
> gopa
>
>
> Quoting "Stancak, Andrej" <A.Stancak at LIVERPOOL.AC.UK>:
>
> > Dear all,
> >
> >   we have some problems reading 4D Neuroimaging MEG data (148
> > sensors). For now, we export original 4D data into BESA format,
> and
> > then read those into FieldTrip. This is not optimal, as e.g.
> gradient
> > coils information is not transferred into FieldTrip. We would be
> > grateful for a plugin or a hint enabling us to read the 4D data
> > directly into FieldTrip.
> >
> >   Best wishes
> >   Andrej Stancak
> >
> >
> > Prof. Andrej Stancak, PhD.
> > The University of Liverpool
> > School of Psychology
> > The Eleanor Rathbone Building
> > Bedford Street South, Room 209
> > Liverpool
> > L69 7ZA
> >
> > E:mail: a.stancak at liverpool.ac.uk  (primary)
> >            stancak at centrum.cz (secondary)
> > Phone: 0151 7946951
> > Office hours: Monday 10-12, Wednesday 10-12
> >
> >
> > ----------------------------------
> > The aim of this list is to facilitate the discussion between users
> of
> > the FieldTrip  toolbox, to share experiences and to discuss new
> ideas
> > for MEG and EEG analysis. See also
> > http://listserv.surfnet.nl/archives/fieldtrip.html and
> > http://www.ru.nl/fcdonders/fieldtrip.
> >
>
> ----------------------------------
> The aim of this list is to facilitate the discussion between users of
> the
> FieldTrip  toolbox, to share experiences and to discuss new ideas for
> MEG
> and EEG analysis. See also
> http://listserv.surfnet.nl/archives/fieldtrip.html and
> http://www.ru.nl/fcdonders/fieldtrip.
>
> ----------------------------------
> The aim of this list is to facilitate the discussion between users of
> the FieldTrip  toolbox, to share experiences and to discuss new ideas
> for MEG and EEG analysis. See also
> http://listserv.surfnet.nl/archives/fieldtrip.html and
> http://www.ru.nl/fcdonders/fieldtrip.
>

----------------------------------
The aim of this list is to facilitate the discussion between users of the FieldTrip  toolbox, to share experiences and to discuss new ideas for MEG and EEG analysis. See also http://listserv.surfnet.nl/archives/fieldtrip.html and http://www.ru.nl/fcdonders/fieldtrip.