Yes I understood the situation with the support of NIFTI qform.
I guess, since sform is supported, I do not understand the difference
between the two in terms of support. Frankly, I do not understand the
difference between sform and qform either and why NIFTI supplies these two
methods as they are identical to me
(x,y,z) = Matrix * (i,j,k) + offset.
Once again, thank you for your clarifications.
On Thu, 21 Oct 2004, Mark Jenkinson wrote:
> Dear Lazar,
> The current FSL release is a beta release and we have
> not yet taken advantage of the full set of possibilities that
> the nifti file format creates. Part of this is that we do not
> use qforms in any of our processing at present. We do
> use sforms for calculating standard space coordinates,
> as is implemented in the current version of fslview.
> Therefore, at present all fsl routines work in ijk coordinates
> in the same way that they always have before. As Dave says,
> the next version of fsl will be likely to support qforms.
> I hope this is clear.
> All the best,
> Lazar Fleysher wrote:
> >Dear David,
> >As far as I understand, qform is the prefered way to express orientation
> >(Method 2 in nifti1.h).
> >The question is if all FSL routines do not support qform or only fslview
> >does not use it? Or all other FSL routines work in ijk coordinates so they
> >do not care about the orientation, it will be the same through out the
> >Thanks for your clarifications.
> >On Thu, 21 Oct 2004, David Flitney wrote:
> >>Okay. Your image has the transform expressed in the NIFTI qform field,
> >>the section related to scanner coordinates, and at present fslview does
> >>not know how/when to use this information. In this case fslview behaves
> >>identically to the older version. We intend to sort this out soon and
> >>the next version is likely to include proper support for use of this
> >>Dave Flitney, Computer Manager
> >>Oxford Centre for Functional MRI of the Brain
> >>E:[log in to unmask] W:+44-1865-222713 F:+44-1865-222717
> >>URL: http://www.fmrib.ox.ac.uk/~flitney