I just realized that a simpler way to create this mask would be to use <div>&quot;ribbon.mgz&quot; and find all the voxels with the labels 2 and 41 which correspond to &quot;Left_White&quot; and &quot;Right_White&quot;.</div>
<div><a href="https://surfer.nmr.mgh.harvard.edu/fswiki/mris%25volmask">https://surfer.nmr.mgh.harvard.edu/fswiki/mris%25volmask</a></div><div>Does this sound correct ? </div><div><br></div><div>Mehul</div><div><br><br><div class="gmail_quote">
On Sun, Nov 8, 2009 at 1:48 PM, Mehul Sampat <span dir="ltr">&lt;<a href="mailto:mpsampat@gmail.com">mpsampat@gmail.com</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
Hi Folks,<div><br></div><div>I want to create a white matter mask (a volume in which all of the white matter voxels are 1 and 0 otherwise)</div><div><br></div><div>For this, I am planning to use wmparc.mgz and then set the voxels with labels of wm-lh-? and wm-rh-? as 1.</div>

<div>(here wm-lh-? represents labels such wm-lh-temporalpole, wh-lh-insula etc)</div><div>From wmparc.stats I found there are 35 such labels for each hemisphere.</div><div><br></div><div>Is this the right way to create the white matter mask ? </div>

<div><br></div><div>Thanks</div><div>Mehul </div><font color="#888888"><div><br></div>
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