Dear Stefano,
On Mon, 17 May 2004, Marenco, Stefano (NIH/NIMH) wrote:
> It has been suggested on this list and also used in the DTI literature, to
> segment the b=0 images with SPM in order to obtain a white matter map. I
> have always been rather suspicious of this approach since the gray/white
> contrast in these images is vastly inferior to the T1 weighted images that
> are usually used for VBM. Does anyone know how the segmentations of b=0 and
> T1 spgrs/mprages compare to each other?
if you have a T1 image with better gray/white contrast you which can be
coregistered to the diffusion weighted images, then you should use this
for segmentation. The suggestion for using the b0 image is useful for
settings where no T1 image can be acquired (e.g. for patients when
measurement time is limited).
Volkmar
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Volkmar Glauche
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Department of Neurology E-Mail [log in to unmask]
UKE Hamburg Phone 49(0)40-42803-5781
Martinistr. 52 Fax 49(0)40-42803-9955
20246 Hamburg
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