Hi surfers,<br><br>We met a problem when processing a monkey&#39;s 
anatomical brain. We got a very good white matter segmentation (wm.mgz)
by manually editing the automatic segmentation.<br>After recon-all, we
found that at some regions, the yellow surface won&#39;t follow the
wm.mgz.  It is strange because the wm.mgz at these regions are very
well defined and smooth. I would expect that the main surface would
follow the wm.mgz tightly and smoothly.  You can see the problem from
the images I attached. These are coronal and horizontal views of one region.<br>
<br>Actually I posted the same type of problem for the other monkey&#39;s
brain in January. We have solved the problem by filling all the
ventricles and improving the smoothness of wm.mgz.  However, we tried
all methods that we learnt from the previous monkey on the second
monkey, but all failed.<br>
<br>I am curious about how the main (yellow) surface is generated. Is
it purelly reconstructed from wm.mgz, or it also need brainmask.mgz? <br>I also edited the brainmask.mgz by darkening the gray matter surrounding the problematic regions, but it didn&#39;t work out either.<br>
<br>I think this problem might be quite common for the monkey community, because we met it on both of our monkeys.<br><br>Thanks,<br><font color="#888888"><br><br>Yang Liu<br></font>