No subject

[Yuval Harpaz]

we had a similar problem but we only needed to interpolate on template MRI.
we copied the pos of the template and it worked fine.
by the way, normalization did not work well for us for more than 10 subjects
or so, RAM problems.
yuval

On 8 July 2010 14:57, Passaro, Antony D <Antony.Passaro at uth.tmc.edu> wrote:

> Hi Arjen,
>
> Thank you very much for your help. I had not added the .pos and .dim to my
> grid before interpolating, but after adding that information I had the same
> result as before. I then checked the .pos and .dim of the data before
> redefining it and noticed that it was already identical to the template grid
> information. I also referred to the example that you had suggested, however,
> I am currently looking at a single subject to verify localization before
> moving on to multiple subject analyses. Additionally, I would like to
> visualize data projected on to a single subject's MRI prior to normalizing
> the data. Any other suggestions would be greatly appreciated.
>
> Thank you again,
> -Tony
> ________________________________________
> From: FieldTrip discussion list [FIELDTRIP at NIC.SURFNET.NL] On Behalf Of
> a.stolk at fcdonders.ru.nl [a.stolk at FCDONDERS.RU.NL]
> Sent: Thursday, July 08, 2010 4:17 AM
> To: FIELDTRIP at NIC.SURFNET.NL
> Subject: [FIELDTRIP]
>
> Hi Tony,
>
> Just to be sure; did you add the .pos and .dim from the template grid to
> your data before interpolating?
>
> In code;
>
> data.pos = template_grid.pos;
> data.dim = template_grid.dim;
> cfg = [];
> cfg.parameter = 'all';
> data_int = ft_sourceinterpolate(cfg, data, mri);
>
> You can then ft_sourceplot the interpolated data.
>
> Best,
> Arjen
>
> p.s. if still running into problems, make sure you have followed the steps
> described here:
>
> http://fieldtrip.fcdonders.nl/example/create_single-subject_grids_in_individual_head_space_that_are_all_aligned_in_mni_space
>
> ----- Original Message -----
> From: "Antony D Passaro" <Antony.Passaro at UTH.TMC.EDU>
> To: FIELDTRIP at NIC.SURFNET.NL
> Sent: Thursday, July 8, 2010 10:41:11 AM GMT +01:00 Amsterdam / Berlin /
> Bern / Rome / Stockholm / Vienna
> Subject: [FIELDTRIP]
>
> Hi,
>
> I've been having issues projecting source estimates onto an MRI. I
> discovered that several of my components (vol, grad, grid) did not exist in
> the same coordinate space. Some were in mm and some in cm. After I resolved
> these issues, I was able to use headmodelplot to verify that everything was
> correct (see attached screenshot). I then attempted source localization
> using lcmv and noticed that that the projected activation existed in the
> incorrect orientation (see second attached screenshot). I'm not sure what
> I'm doing wrong as all of my components are in the correct space. I also
> tried to use the interactive option of sourceplot to correctly set n,l,r but
> that didn't seem to change anything. I'm sure it is something very simple
> that I am overlooking but any help would be much appreciated.
>
> Thank you,
> -Tony
> ----------------------------------
> 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/neuroimaging/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/neuroimaging/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/neuroimaging/fieldtrip.
>



--
Y.Harpaz

a link to the BIU MEG lab:
http://faculty.biu.ac.il/~goldsa/index.html

----------------------------------
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/neuroimaging/fieldtrip.
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