Hi,
On 15 Sep 2009, at 14:04, Maxim Bester wrote:
> dear fsl - board!
>
> using sienax i usually assume that the vscale value should range in
> healthy
> subjects between 1.2-1.5.
Correct,
> In a current study i find many healthy controls
> with very good bet an flirt results - even after midifying the sienax
> options i never get vsscale values below 1.8.. can i assume in this
> case a
> given small brain volume or should i go on to try to modify the sienax
> options (even if the results on the html.report look fine?
You should first look at the web-page report created by SIENAX to
check that the standard-space registration worked well. If it did then
yes either you have very small brains, or the voxel dimensions are
wrong in the header of your input data.
Cheers.
>
> thanks
>
> maxim
>
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Stephen M. Smith, Professor of Biomedical Engineering
Associate Director, Oxford University FMRIB Centre
FMRIB, JR Hospital, Headington, Oxford OX3 9DU, UK
+44 (0) 1865 222726 (fax 222717)
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