Dear SPMers
Hi, i'm new to SPM,
and I have some questions about deformation.
Thank you for your instruction in advance.
1. For point normalization, I first get the inverse deformation followed
by the code at Gem 5, Normalizing [x y z] at "John's SPM2 Gems".
However, the corresponding position on template away
from the volume center cannot be found by this method, even including
landmark as
LPA, Nasion, adn RPA. I think these landmark should exist because I can see
them on the graph result of SPM Normalization. I'd like to use these
landmark
to verify that the deformation is correct. How to get these point?
2. I would also like to use deformation to get corresponding position on
individual's MRI from template. Can I use the deformation, y_xxxx.img, in
the opposite way of Gem 5, Normalizing [x y z] at "John's SPM2 Gems"?
If it is implausible, how to do it?
3. Are both "deformation, y_xxxx.img" and "inverse deformation,
iy_xxxx.img" already containing the information of affine matrix?
Therefore I can apply them without additionally adding affine matrix. Is
that correct?
4. I would like to overlay deformation field on individual's MRI.
But the volume size of deformation field is not the same as MRI.
Therefore, I cannot overlay them directly. How should I manipulate
the volume to make them in the same size? Therefore, I can overlay them.
5. At last, I'd like to learn more about the data structure and
manipulation methods
of deformation, inverse deformation, and everything related.
where can I get the manual or any reference recommended for me to read?
Thank you for your help again.
Sincerely,
Po-He
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