Dear Simone,
Sorry to be a bit unlcear - by V*.img files I meant simply the data files
that you would regularly enter into the statatistcs stage, i.e the
image files containing the data that have undergone the preprocessing
steps you would like to apply. These would usually be labeled snaV001.img,
snaV002.img,... though there could be other prefixes (snV*, srV*,
etc) depending the exact preprocessing stages.
Before any preprocessing though, you would need to start from unprefixed
V001.img, V002.img, etc files. Each of these files containins the image
intensities for the entire brain that correspond to different temporal
frames collected in the scanner. If you are not sure how to generate them,
you could look up previous messages in the spm database for various
converters that transform scanner output to Analyze data format.
Hope this is helpful. Best,
Kalina
On Tue, 8 Aug 2000, A.A.T.S. Reinders wrote:
> Dear SPMers,
>
> On 25 Jun 2000 - 22:02 BST Kalina Christoff wrote:
>
> > The compression would be relevent, however, if the goal is to compute
> > some statistics on the extracted data that would involve taking sums of
> > squares (e.g. standard error estimates, or parameter fits). In this case
> > using the Y.mad file should probably be avoided and the data should be
> > extracted from the V*.img files.
>
> However, it is not clear to me where I can find this V*.img files, when they
> are generated and exactly what information is stored in this images?
>
> Thanks in advance,
>
> Simone.
>
>
> --
> A.A.T.S. Reinders
>
> Groningen University Hospital
> Biological Psychiatry, Room 6.21
> Hanzeplein 1, 9713 GZ Groningen Phone: +31 (0)50 361 2036/3855
> P.O. Box 30001, 9700 RB Groningen Fax : +31 (0)50 361 1699
> The Netherlands Email: [log in to unmask]
>
>
_____________________________________________________________________________
Kalina Christoff Email: [log in to unmask]
Office: Rm.478; (650) 725-0797
Department of Psychology Home: (650) 497-7170
Jordan Hall, Main Quad Fax: (650) 725-5699
Stanford, CA 94305-2130 http://www-psych.stanford.edu/~kalina/
_____________________________________________________________________________
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|