<div dir="ltr">Yep - I'm only talking about structural, not functional. We have a similar problem in ECoG, but in our case we need to localize electrodes on the cortical surface. We don't have an MRI of these electrodes, but we do usually have CT scans. So I'm trying to find a python pipeline for co-registering the CT (where the electrodes are) to the MR (where the anatomy is). E.g., I asked on the neuroimaging listserv and someone has put together a GUI for something like this:<div><div><br></div><div><a href="https://github.com/aestrivex/gselu/" target="_blank">https://github.com/aestrivex/gselu/</a><br></div><div><br></div><div>The reason I'd like to do this is in order to use Freesurfer for the MR processing / surface extraction, and then to do electrode plotting on top of that.</div><div><br></div><div>Chris</div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Nov 23, 2015 at 8:48 AM, Denis-Alexander Engemann <span dir="ltr"><<a href="mailto:denis.engemann@gmail.com" target="_blank">denis.engemann@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><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.<span><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>> 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><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></span></div>
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