Hi,
We have aquired functional data that is oblique with respect to the
axial plane. SPM seems to be able to analyze for function, but now
I want to plot on top of structural image. First, the volumes are not
full brain and the planes of acquisition are NOT axial thus I am not
normalizing to talairach coords. However if I do "slices" I presume that
the coordinates that SPM is using to pick the right slice still are
valid for my structural image, which at the moment is just one of my
functional images.
Eventually I would like to plot to higher res (t2) structural images
that we took with the same acquisition plane orientation. Will SPM do
this for me automatically? Or should I worry that SPM has done
transformations behind the scene that I am not aware of? (I have done at
least the realing on the data set, though not the higher res t2
structural images. The realignment is only a few mm in each direction so
that should be ok if I am just looking for gross spatial resolution of
function.)
Finally, I will want to plot onto our own t1 structural data that is
indeed in the normal axial plane. Presuming I can get the angle from the
scanner data, I should be able to rotate the functional volumes into the
correct orientation (something like 15-20 degrees). Can you tell me what
SPM functions I can use to do this rotation and reslicing? Does this
sound like the correct approach.
Thanks,
Robert
--
Robert C. Welsh, PhD
Department of Radiology
University of Michigan
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