Dear Hankee,
This is a very low VSCALING.
Have you *thoroughly checked the output page* to
make sure that the brain extraction and registration
are good.
You should NOT use this value unless you are
really sure that the extraction and registration has
done well.
All the best,
Mark
On 10 Nov 2009, at 13:38, SUBSCRIBE FSL hankee wrote:
> Hi,
> Thank you for you detail information!!!
> Now I find the VSCALING in report.sienax file and the file's content
> shows
> like this:
>
> SIENA - Structural Image Evaluation, using Normalisation, of Atrophy
> part of FSL www.fmrib.ox.ac.uk/fsl
> running cross-sectional atrophy measurement: sienax version 2.6
> sienax
>
> ---------- extract brain
> --------------------------------------------
>
> ---------- register to standard space using brain and skull --------
> (do not worry about histogram warnings)
> VSCALING .6096971662
>
> ---------- mask with std mask
> ---------------------------------------
>
> ---------- segment tissue into types
> --------------------------------
>
> ---------- convert brain volume into normalised volume
> --------------
>
> tissue volume unnormalised-volume
> GREY 915490.99 1501550.34
> WHITE 631955.31 1036506.89
> BRAIN 1547446.30 2538057.23
>
> So the ICV is 1547446.30 which is normalised by VSCALING? It's that
> right?
>
> Thank you very much!
> Best regards!
> yours sincerly:
> Hankee
>
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