[Mristudio-users] Gradient tables and SPM coregistration

[Dorian P.]

Hi everybody, and happy holidays,

I am using DTIstudio in a complex workflow.

First, I need to make a nonlinear registration using masks on lesioned
data. SPM is doing a good job at this point. To apply the transformation
matrix produced by SPM, I must export images from DTI studio (analyze
format), apply the deformations in SPM and import the files back to
DTIstudio. However I am not sure whether a problem arises with the gradient
tables not being the same any more. How can I apply the transformation
matrix from SPM? Is there maybe a way to convert .mat files to .vtk and do
all transofmrations in DTIstudio/Diffeomap?


Second, having both T1 and b0 images in two different sessions, which one
is better in theory for registration, T1s or B0s ? In many examples the b0
has been used for linear (AIR) and nonlinear (LBBDMM) registration. But on
the other side a b0 is acquired in a fraction of the time of a T1, so may
be less stable to artifacts (or with fat artifacts?).

Thank you.
Dorian
TJU
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