[FieldTrip] Source locations onto an anatomical label in an atlas

[Eelke Spaak]

Hi Sara,

Are you using a recent version of FieldTrip? I think the fields
atlas.brick0 etc. have long been replaced with atlas.tissue. Let me
know if the issue persists if you use a recent FT.

Cheers,
Eelke

On Sat, 18 May 2019 at 18:30, Sara Noriega Casuso
<sara.noriega at alumni.mondragon.edu> wrote:
>
> Hello all,
>
> I have performed source reconstruction and now I want to interpolate an atlas onto my sourcemodel, and I am following this tutorial:
> http://www.fieldtriptoolbox.org/faq/how_can_i_map_source_locations_between_two_different_representations/
>
> I have downloaded the source model: standard_sourcemodel3d10mm.mat and the atlas ROI_MNI_V4.nii mentioned in the tutorial and computed this code:
>
>    > atlas_MNI = ft_read_atlas('ROI_MNI_V4.nii');
>
>    > load('standard_sourcemodel3d10mm.mat')
>
>
>
>    >  cfg = [];
>
>    > cfg.interpmethod = 'nearest';
>
>    > cfg.parameter = 'tissue';
>
>    > sourcemodel2 = ft_sourceinterpolate(cfg, atlas_MNI, sourcemodel);
>
>
> However, I get this error:
>
>
> Reference to non-existent field 'tissue'.
>
>
> Error in getsubfield (line 45)
>
>   s = s.(t{k});
>
>
> Error in ft_sourceinterpolate (line 215)
>
>   if ~iscell(getsubfield(functional, cfg.parameter{i}))
>
>
> The atlas_MNI structure is defined as:
>             dim: [91 109 91]
>             hdr: [1×1 struct]
>       transform: [4×4 double]
>            unit: 'mm'
>        coordsys: 'unknown'
>          brick0: [91×109×91 uint16]
>     brick0label: {1×9170 cell}
>
> And the sourcemodel is:
> dim: [18 21 18]
>        pos: [6804×3 double]
>     inside: [6804×1 logical]
>        cfg: [1×1 struct]
>       unit: 'cm'
>
> I know that the units are not equal, but the error does not come from that argument.
> Someone knows how can I handle this error?
>
> Thank you in advance,
> Sara
>
>
>
>
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> https://doi.org/10.1371/journal.pcbi.1002202

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