Hi Jokel,
The problem is that your structural T1w image does not have the same
modality (contrast) as the DTI data otherwise you could use the
nonlinear registration methods in SPM.
As Bas suggested, you could use the spm_coreg-function, which is
supposed to register images of different modalities. However, the
coreg-function as implemented in SPM uses only rigid-body
transformations. So, if your DTI data do not suffer from susceptibility
artifacts (because you removed them using e.g. the fieldmap toolbox),
spm_coreg will be optimal for your purpose. However, if your DTI data
suffer from susceptibility artifacts, you will have mis-registrations
(e.g. towards the frontal lobe, where the distortions due to
susceptibility artefacts are most prominent). So the next question is,
where is your ROI located (towards the cortex the spm_coreg might do a
reasonable job).
Siawoosh
> Datum: Fri, 17 Aug 2012 13:21:32 +0200
> Von: Jokel Meyer <[log in to unmask]>
> An: Siawoosh Mohammadi <[log in to unmask]>
> Betreff: Re: [SPM] Transform nii file to DWI or b0 space
> Hi Siawoosh,
>
> It is structural data in MNI. The ROI was generated from a ALE
> meta-analysis (www.brainmap.org) of VBM studies of white-matter
> abnormalities in a patient population. Any ideas how to transform
this ROI
> nii into the DWI ob b0 space so I could visualize the tracts running
> through this ROI e.g. using TrackVis (www.trackvis.com)?
>
> Best,
> Jokel
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