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P.S. It is possible that SPM encode the relevant transformation in the sform of the image, in which case we can interpret it.  To see if that is the case try the following command-line option:
  flirt -usesqform -applyxfm -in yourinputimage -ref standardimage -out desiredoutputname
if this works then great, otherwise you're back to what I wrote in the previous email.


On 29 Aug 2012, at 06:57, Mark Jenkinson <[log in to unmask]> wrote:

Hi,

If you only have co-registration from SPM then you'll either need to resample in SPM or do another registration in FSL.  We cannot read the SPM format.

All the best,
Mark


On 28 Aug 2012, at 23:46, Yune Lee <[log in to unmask]> wrote:

Hi Mark,
I indeed don't have the transformation matrix as coregistration was done in SPM.
Then, I'm assuming that it is not possible using APPlyXFM GUI?


On Tue, Aug 28, 2012 at 5:50 PM, Mark Jenkinson <[log in to unmask]> wrote:
Hi,

If you want to resample to the same voxel size and FOV as another image, then use the ApplyXFM GUI.

If you also want it to be aligned then you need to run registration.
See the FSL Course and other documentation for more information about registration, if that's what you need.

All the best,
        Mark



On 28 Aug 2012, at 22:45, Yune Lee <[log in to unmask]> wrote:

> Hi FSL users,
> I wonder if anyone knows the way of downsampling an anatomy from 1mm to 2mm istropic cubic, such that the voxel resolution is matched between anatomy and EPIs.
> Any help would be greatly appreciated.
>
> -YSL