Hi,
I have a study that I would like to do a group analysis by utilizing
contrast images. However I know that I need to obviously normalize
these.
This is what I did:
1) I realigned my functional and produced mean images.
2) I coregistered my t1's withOUT slicing to my mean functional images,
thus just producing mat files.
3) then I took my coreged t1's and normalized them, hopefully spm
picked up the coreg params from the mat files.
4) I analyzed my realigned functional data and produced contrast
images.
5) I applied the normalization parameters from step 3) to the contrast
images produced in step 4)
6) I took the normalized contrast images and did a simple 1 sided
t-test.
So, my results in the glass brain don't look so hot, they appear too
low. It seems that the normalization-coreg step failed some how.
Question, when I do step 2 and just do the coreg without the reslicing
and produce the mat files will step 3) know to use the mat files when I
point to the images and produce correctly normalized contrast images?
I am using spm99b.
Thanks,
Robert Welsh
|