[FieldTrip] sourceplot - beamforming

[Davide Rivolta]

Dear Jan-Mathijs,
Thank you for your email.

I have done as you said. I ran ft_volumereslice.
As you can see from the piture (source2) I get something really weird.
I am using the correct cfg.dim, however I am not sure about the
cfg.resolution. Where can I pick the correct value? In the case of the
picture I used 1.

After this, I run ft_sourceinterpolate and then ft_sourceplot.

Is this the correct sequence?
 Source1 represents the source before running ft_volumereslice.


Thanks for the advice,

Davide






On Tue, Nov 8, 2011 at 10:58 AM, jan-mathijs schoffelen <
jan.schoffelen at donders.ru.nl> wrote:

> Hi Davide,
>
> Apart from putting your computer monitor upside down you could reslice
> your anatomy prior to doing the interpolation (using ft_volumereslice).
>
> Best,
>
> Jan-Mathijs
>
>   On Nov 7, 2011, at 12:37 PM, Davide Rivolta wrote:
>
>
> Dear Fieldtrippers,
>
> I have a question about ft_sourceplot (version 20111009).
>
> I am following the tutorial on the reverse grid transformation (
> http://fieldtrip.fcdonders.nl/example/create_single-subject_grids_in_individual_head_space_that_are_all_aligned_in_mni_space?s[]=normalization
> ).
>
> I can get to the end of the script and try to plot the relative change in
> power of the stimulus condition again the baseline (visual task).
>
> I have attached the figures I get from one subject only.
>
> First of all, it is upside-down. Is it correct? How to change this?
>
>
> Here is the script I use:
>
>     mri = ft_read_mri(mri_name);
>     cfg            = [];
>     cfg.downsample = 1;
>     sourceDiff.dim           = [17 20 17];
>     sourceDiff_Int  = ft_sourceinterpolate(cfg, sourceDiff , mri);
>
>     cfg               = [];
>     cfg.method        = 'ortho';
>     cfg.funparameter  = 'avg.pow';
>     cfg.maskparameter = cfg.funparameter;
>     cfg.units         = 'mm';
>     cfg.opacitylim = [0.2 1.3];
>     ft_sourceplot(cfg,sourceDiff_Int);
>
>
>
>
>
> This is the structure of sourceDiff_Int:
>
> sourceDiff_Int =
>
>        inside: [256x256x256 logical]
>           avg: [1x1 struct]
>           dim: [256 256 256]
>     transform: [4x4 double]
>       anatomy: [256x256x256 int16]
>      coordsys: 'ctf'
>          unit: 'mm'
>           cfg: [1x1 struct]
>
>
>
> Thanks for the help,
>
> Davide
> <ortho.jpg><slice.jpg>_______________________________________________
> fieldtrip mailing list
> fieldtrip at donders.ru.nl
> http://mailman.science.ru.nl/mailman/listinfo/fieldtrip
>
>
>   Jan-Mathijs Schoffelen, MD PhD
> Donders Institute for Brain, Cognition and Behaviour,
> Centre for Cognitive Neuroimaging,
> Radboud University Nijmegen, The Netherlands
> J.Schoffelen at donders.ru.nl
> Telephone: +31-24-3614793
>
>
> _______________________________________________
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>



-- 
Davide Rivolta, PhD
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