Erin - the short answer is no - there is no flag to ignore certain slices
in certain orientations. If you did this you would have different biases
on your estimates of (e.g.) anisotropy in different slices. How much of an
affect this would have depends on how much data you collected originally.
If you collected many directions, and/or many averages, there may be
things you can do to replace dodgy data without messing up the estimates
too much, but it very much depens on exactly what data you acquired.
T
-------------------------------------------------------------------------------
Tim Behrens
Centre for Functional MRI of the Brain
The John Radcliffe Hospital
Headley Way Oxford OX3 9DU
Oxford University
Work 01865 222782
Mobile 07980 884537
-------------------------------------------------------------------------------
On Mon, 1 Nov 2004, Erin Gibson wrote:
> Is there anyway of having dtifit ignore particular image files (e.g. slice
> 5, orientation 2) when calculating FA? I'm wondering how best to deal with
> the odd image file that is contaminated by artifact.
>
|