<p><span style="padding: 3px 10px; border-radius: 5px; color: #ffffff; font-weight: bold; display: inline-block; background-color: #ff0000;"> External Email - Use Caution </span></p><p></p><div dir="ltr"><div>Hi Emily,</div><div><br></div><div>We don't have a way to read the native file from FastScan in MNE. However, we do support data exported as text files. I don't have the software handy but there should be a way to export the surface points, electrode points, and the fiducials, all as separate text files. We based this off the routine we used for the KIT-NYU lab where we bundled the electrode points and the fiducials in the same file export.<br></div><div><br></div><div>For creating the DigMontage, we have a function `read_dig_montage` that takes these text files as input. <br></div><div>- The HPI are the marker points that your MEG system generate in the native MEG space</div><div>- The ELP are those same points that are digitized in the native FastScan space with the addition of the fiducials, which are in the same native FastScan space.</div><div>- The point names are labels for the markers and then the name of the fiducials (nasion, lpa, rpa) in their respective order from the ELP file.</div><div><br></div><div>Please follow up if you have any more questions about this and how we might make it more accompanying for other lab setups.<br></div><div><br></div><div>HTH,<br></div></div><br><div class="gmail_quote"><div dir="ltr">On Wed, May 16, 2018 at 1:17 PM Emily Stephen <<a href="mailto:emilyps14@gmail.com">emilyps14@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><p><span style="padding:3px 10px;border-radius:5px;color:#ffffff;font-weight:bold;display:inline-block;background-color:#ff0000"> External Email - Use Caution </span></p><p></p><div dir="ltr">Hi All,<div><br></div><div>My lab has started using a new *Polhemus FastScan II* system to get the digitization data (head shape points, electrode position points, fiducials). <span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">The scanner itself doesn't identify or output the points: it returns a 3d head surface image, from which we'll need to extract the electrode positions, etc. W</span><span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial">e are working on a tool to label the points manually and output them in a format that we can use in MNE to create a DigMontage.</span></div><div><br></div><div>(1) Has anyone used this system before with MNE? We'd rather not re-invent the wheel if we don't have to.</div><div>(2) If not, is there a spec or detailed description of (a) the point definitions and (b) digitizer file formats, that we could use as a basis for the outputs of our tool?</div><div>(3) Any other advice for us or pitfalls that we should watch out for?</div><div><br></div><div>Thanks,<br>Emily</div></div>
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</blockquote></div><br clear="all"><br>-- <br><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div><a href="http://www.twitter.com/teon_io" style="font-size:12.8px" target="_blank">teon</a><span style="font-size:12.8px">, phd</span><br></div></div></div></div></div></div></div></div></div></div></div></div></div></div>