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rordenlab / MRIcroGL

v1.2 GLSL volume rendering. Able to view NIfTI, DICOM, MGH, MHD, NRRD, AFNI format images.
https://www.nitrc.org/plugins/mwiki/index.php/mricrogl:MainPage
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Is a MNI152 to SPM152 transformation available? #53

Closed Shotgunosine closed 9 months ago

Shotgunosine commented 1 year ago

I've got some points and ROIs I've mapped in MNI152, but I've just realized they may have been origialy plotted on something closer to the SPM152 template. Is there a transformation from MNI152 to SPM152 available? Is is just a rescaling?

neurolabusc commented 1 year ago

As noted in the original manuscript, the alignment and averaging process of the MNI152 led to the template being larger than the average brain. In contrast, the templates provided by SPM were designed to have an average size. A more description of the issue is Figure 1 at Horne et al. MRIcroGL is merely a visualization tool, so your question is beyond the scope of MRIcroGL. However, you could use your favorite spatial normalization tool to compute a spatial transform between these two spaces, and apply this to your data. If you constrained this to linear only transform (e.g. FSL FLIRT with 12-dof) you could get a simple 4x4 matrix that would transform any voxel from one mapping to the other.