Hi - please see the usage description that you get when you type
"ip". The -s flag is followed by the spatial sigma width - i.e.
approx half of the FWHM. Hence you would want to specify 3 here to
get 6mm FWHM.
Cheers.
On 19 Jul 2007, at 22:44, Peter Fried wrote:
> Hi All,
>
> To perform gaussian spatial smoothing of 6mm FWHM in the command-
> line, do
> I simply run the command:
>
> ip <input> <output> -s 6
>
> Or do I need to calculate a different value for -s?
>
> Also is the threshold value arbitrary?
>
> Thanks.
>
> -Pete Fried
------------------------------------------------------------------------
---
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)
[log in to unmask] http://www.fmrib.ox.ac.uk/~steve
------------------------------------------------------------------------
---
|