Dear Matteo,
The inner workings of the FLIRT coordinate system are, unfortunately,
not the most straightforward. I recommend sticking with using img2imgcoord.
If you really want to know more about this there have been some emails on
the list in the past on this topic, so just search the list for this information.
All the best,
Mark
On 16 Jan 2012, at 16:38, Matteo Santilli wrote:
> Hi everybody,
> I'd like to have some clarification about the "img2img" function.
>
> I would like to refer in a T1-image the position V(x,y,z) of a voxel localized in a DTI-image.
> I used img2imgcoord to get the corresponding coordinate on the DTI, then i tried to find out how this function works.
> Using FLIRT I have calculated the xfm matrix, then i multiplied this matrix to the coordinates of the voxel getting a new position wich has no corrispondence at all
> with those obtained using img2imgcoord.
> What am I doing wrong?
>
> Thanks in advance!
>
> Matteo Santilli
> La Sapienza Neuroimaging Lab, Rome
>
|