[FieldTrip] change radiological to neurological convention

[Kathrin Müsch]

Thanks, Jan-Mathijs!

Am 31.05.2012 um 12:21 schrieb jan-mathijs schoffelen:

> Hi Kathrin,
> 
>> 1) Is it correct that the functional data is flipped when the anatomy is in radiological convention (left is right)? 
> 
> Yes. FieldTrip does not have any of the 'conventions'. It just takes the data as it is represented in the mri-file (i.e. the block of voxels is oriented in a certain way, and FT just plots along the 3 cardinal voxel axes). For example, in DICOM images the voxel axes are often left-handed, leading to visualization according the 'radiological' convention.
> 
> 
>> 2 ) How can I change the transformation matrix of my anatomy so that my results are plotted in neurological convention (i.e. left is left) - with ft_volumenormalise or ft_volumerealign?
> 
> If the coordinate system in which the data are defined is right-handed, you can use ft_volumereslice to get the anatomical image to be visualized in neurological convention.
> This function only works on anatomical data, so you should first reslice the anatomical data and only then interpolate the functional data onto the resliced anatomy.
> 
> Best,
> 
> Jan-Mathijs
> 
> 
>> Any help is very much appreciated.
>> 
>> Best,
>> Kathrin
>> --
>> Pflichtangaben gemäß Gesetz über elektronische Handelsregister und Genossenschaftsregister sowie das Unternehmensregister (EHUG):
>> 
>> Universitätsklinikum Hamburg-Eppendorf; Körperschaft des öffentlichen Rechts; Gerichtsstand: Hamburg
>> 
>> Vorstandsmitglieder: Prof. Dr. Guido Sauter (Vertreter des Vorsitzenden), Dr. Alexander Kirstein, Joachim Prölß, Prof. Dr. Dr. Uwe Koch-Gromus 
>> _______________________________________________
>> fieldtrip mailing list
>> fieldtrip at science.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
> 
> Max Planck Institute for Psycholinguistics,
> Nijmegen, The Netherlands
> 
> J.Schoffelen at donders.ru.nl
> Telephone: +31-24-3614793
> 
> _______________________________________________
> fieldtrip mailing list
> fieldtrip at science.ru.nl
> http://mailman.science.ru.nl/mailman/listinfo/fieldtrip


--
Pflichtangaben gemäß Gesetz über elektronische Handelsregister und Genossenschaftsregister sowie das Unternehmensregister (EHUG):

Universitätsklinikum Hamburg-Eppendorf; Körperschaft des öffentlichen Rechts; Gerichtsstand: Hamburg

Vorstandsmitglieder: Prof. Dr. Guido Sauter (Vertreter des Vorsitzenden), Dr. Alexander Kirstein, Joachim Prölß, Prof. Dr. Dr. Uwe Koch-Gromus 
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