Hi Christine,

I have not had much time to look at this, but have
some comments now.

When I run this, the part outside the mask does get
zero'd out, and the part inside gets blurred.

In your case, then no blur operation happened, it
seems to be because your blur was already estimated
to be above 4.0 mm, so there was nothing to do.

But a general point is that the program relies on
having proper data to estimate a blur from, such as
either EPI time series or residuals. If you are
trying to blur the _output_ from 3dDeconvolve, then
you should really have a -blurmaster option in place,
which would pass in EPI or residual data.

The output from 3dDeconvolve is not so appropriate
for estimating a blur.

Also, the program is blurring the data _until_ it gets
to the blur estimate that you requested. It is not
simply adding that much. For simply adding blur,
use 3dmerge or 3dBlurInMask.

- rick