[FieldTrip] flipped sourceplot

[Xie Wanze]

Hi Elena,
I had the same issue when I use the sour interpolation function in
Fieldtrip.  This is what I did: outsource.pos(:,1) = outsource.pos(:,1)*-1;
My images are in the SPM system with the AC's coordinates being [0 0 0] and
the sagittal (X) coordinate of the PC being 0 too.
However, it seems that the ft_sourceinterpolate flips my source images
occasionally (not for all the data). I did not spend too much time on it,
so I still have no idea why the function does that.

Best,
Wanze





2018-06-21 9:17 GMT-04:00 Elena Krugliakova <krugliakova.es at gmail.com>:

> Dear Jan-Mathijs,
>
> Thank you for your answer, it helped!
>
> But additionally I needed to interpolate atlas on the resliced mri,
> otherwise ft_sourceparcellate gave me an error "*the source positions are
> not consistent with the parcellation*".
>
> Best,
> Elena
>
> On 21 June 2018 at 11:43, Schoffelen, J.M. (Jan Mathijs) <
> jan.schoffelen at donders.ru.nl> wrote:
>
>> Hi Elena,
>>
>> I guess that any graphics editing program (like adobe illustrator, or
>> even windows paint) can flip the figure for you. :)
>> If you want to do this prior to generating the figure, you can cal
>> ft_volumereslice on your anatomical image. Provided the coordinate system
>> attached to the volume is right handed, right will be right and left will
>> be left, after reslicing.
>>
>> Best wishes,
>> Jan-Mathijs
>>
>> On 21 Jun 2018, at 11:23, Elena Krugliakova <krugliakova.es at gmail.com>
>> wrote:
>>
>> Dear FieldTrip users,
>>
>> I am trying to plot my source localisation results on parcelled brain
>> following this tutorial:
>> http://www.fieldtriptoolbox.org/tutorial/salzburg#plot_the_
>> result_in_parceled_brain_space
>>
>> Similarly to the figure in tutorial I get plot with inverted left-right
>> axis (left appears on the right and right on the left). I guess this is
>> related to the transformation matrix of* template_mri* that is used for
>> interpolation of source and atlas.
>>
>> Is there some way to flip left and right on the sourceplot?
>>
>> Thanks!
>>
>> Elena
>>
>>
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>
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