Hi Ruth - These parameters are described in Benner 2011 (cited in our
paper). The -T threshold is mostly what you might need to change,
depending on your scanner. You should look at the low-b images and find a
rough lower threshold for the image intensities of brain voxels. It
doesn't have to be exact, but it shouldn't be off by
an order of
magnitude, either.
Also, for the purposes of a group study, the most important thing is
differences in motion measures between groups or correlation between
motion measures and study effects, rather than the absolute values of the
motion measures themselves.
Hope this helps,
a.y
On Fri, 14 Mar 2014, Ruth Carper wrote:
> Hi,
> I've been using dmri_motion to quantify motion in our DTI data. Can you
> give any guidance on selecting values for the -D and -T flags? I didn't see
> anything in the wiki or in your related papers and it can have a substantial
> effect on the outputs.
> Thanks.
>
>
>
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