Dear Spmers,
I have some doubts abouts how to do a longitudinal VBM with SPM5.
What I was planning to do is
- to segment the first scans using the default priors to create my own GM, WM
and CSF priors,
- to segment the first scans again using my own GM,WM and CSF priors and
writing modulated and unmodulated normalized segmented images,
- to coregister the second scan to the first one,
- to segment the second scan and write segmented images in the native space,
- to apply the normalization parameters of the first scans, obtained in
segmentation step, to the second segmented scans
- to smooth the images.
In this case, to create my own template doesn't seem necessary, just the
priors.
The first question is if this procedure is suitable and the most adequate. The
second question is how to change normalize writing options (voxel size) when
creating normalized segmented files from segment function.
Any advice on these questions would be much appreciate.
Thanks
Carles Falcon
IDIBAPS-Hospital Clinic Barcelona
University of Barcelona. SPAIN
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