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<div>Hi there,</div>
<div>I found this very nice thread on warping between spm and ctf space (thanks Jan-Mathijs and Stan) and at first sight it seems to work fine (numbers match after applying warping back and forth) but when I try to navigate to the spot in the plotted figure the point of interest seems not to be the same.</div>
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<div>mri_realign_mni=ft_volumenormalise([],mri_realign)</div>
<div>% Inverse warping</div>
<div>mnipos=[-48 -75 8]; % [46 -78 6]; MT</div>
<div>posback=ft_warp_apply(mri_realign_mni.params,mnipos,'sn2individual')</div>
<div>ctfpos= ft_warp_apply(pinv(mri_realign_mni.initial),posback)</div>
<div> </div>
<div> -8.6110 55.6190 50.0473</div>
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<div>I plotted either (see .jpg)</div>
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<ol style="list-style-type: upper-alpha;">
<li>the source (source = ft_sourceanalysis(cfg, freq));</li>
<li>the interpolated source (sourceInt = ft_sourceinterpolate(cfg, source , mri_realign);</li>
<li>the normalized source (sourceIntNorm = ft_volumenormalise(cfg, sourceInt);</li>
</ol>
<div> </div>
<div>and manually navigated to the respective coordinates. While for the normalized source the location makes sense (area MT) the location for A and B seems different.</div>
<div> </div>
<div>Is there any obvious mistake I’m overlooking?</div>
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<div>Thanks a lot!</div>
<div>Barbara</div>
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