This sounds sensible, yes, though of course this only works if the
operation itself hasn't caused large changes in the locations of the
remaining brain tissue.....
Cheers, Steve.
On 6 Oct 2008, at 15:43, Mahinda Yogarajah wrote:
> Hi Steve,
>
> Thank you for the advice regarding post-operative TBSS. I was
> wondering
> whether the following would be another way of getting around the
> problem of
> having to use masks. Could one take the pre-op images in each
> subject and
> co-register (no non-linear transformations) them to each subject's
> post-op
> image (each subject having had a similar standard operation, though
> with
> slightly varying amounts of tissue removed). Could one then use the
> co-registered pre-op images to derive the non-linear transformation,
> and
> apply this to the post-op images, before then proceeding. Is this a
> valid
> method, although I appreciate scan-rescan variability may be the
> source of
> some error.
>
> Thanks.
>
> Mahinda
>
---------------------------------------------------------------------------
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
---------------------------------------------------------------------------
|