<div dir="ltr">No ambiguities here, of course you need a structural scan. I might hav misread Chirs' question. We commonly use Freesurfer here. But we don't need functional scans.<br><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Nov 23, 2015 at 5:46 PM, Tom Holroyd <span dir="ltr"><<a href="mailto:tomh@kurage.nimh.nih.gov" target="_blank">tomh@kurage.nimh.nih.gov</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class="">> Actually less so, speaking for people I know. You don't need fMRI to<br>
> source localize MEG.<br>
<br>
</span>You generally DO need a structural MRI, for calculation of the inner<br>
skull surface used in generating theoretical magnetic fields. Without<br>
an MRI you can only approximate the shape of the brain using a sphere.<br>
Multisphere or Nolte is typically used given a real brain shape. AFNI's<br>
3dSkullStrip is fine for generating the surfaces.<br>
<span class="HOEnZb"><font color="#888888"><br>
--<br>
Dr. Tom<br>
--<br>
"I am, as I said, inspired by the biological phenomena in which<br>
chemical forces are used in repetitious fashion to produce all<br>
kinds of weird effects (one of which is the author)."<br>
-- Richard Feynman, _There's Plenty of Room at the Bottom_<br>
</font></span></blockquote></div><br></div></div>