> 1) What are the effects of BB size variations?
Your spatially normalised images will have different fields of view. There
is no effect on the estimation of the normalisation parameters. Different
bounding boxes may give up to a half voxel difference in specification of
co-ordinates.
>
> 2) Will the BB size affect the coordinate values obtained in the
> Statistics table in the SPM analysis? Can I report them as Talairach
> coordinates?
You can report them in co-ordinates similar to Talairach - i.e., ICBM
co-ordinates.
>
> 3) Can I use Matthew Brett's "mni2tal" utility in this case also to
> obtain appropriate Talairach coordinates?
Providing that you document that you have done this.
Best regards,
-John
--
Dr John Ashburner.
Wellcome Department of Cognitive Neurology.
12 Queen Square, London WC1N 3BG, UK.
tel: +44 (0)20 78337491 or +44 (0)20 78373611 x4381
fax: +44 (0)20 78131420
http://www.fil.ion.ucl.ac.uk/~john
mail: [log in to unmask]
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