<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Dear Max, <div><br></div><div>I don't think there is a conceptual objection against building in support for the NM306 system, although it may be less trivial to do a combined simultaneous realignment of planar gradiometers and magnetometers. The choice of the 4 sensors used to compute the transformation matrix between the 'old' and 'new' sensor positions seems reasonable to me.</div><div>On a side note, doesn't the maxfilter provide you with the possibility to correct for differences in head position?</div><div><br></div><div>Cheers,</div><div><br></div><div>Jan-Mathijs</div><div><br><div><div>On Jul 15, 2010, at 11:41 PM, Maximilien Chaumon wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite">Thank you,<br>The layout of our neuromag306 is not supported in ft_megrealign.<br>What sensors should I write for constructing the average location of the MEG sensors?<br>(line 190 and below)<br>I have triplets of sensors that match this layout.<br> <a href="http://fieldtrip.fcdonders.nl/_detail/tutorial/layout/nm306all.png">http://fieldtrip.fcdonders.nl/_detail/tutorial/layout/nm306all.png</a><br><br>Figured out these guys might work, but that's just a guess. I've done no calculation or anything...<br> <br> labC = 'MEG 2111';<br> labF = 'MEG 1011';<br> labL = 'MEG 0141';<br> labR = 'MEG 1431';<br><br><br>thanks,<br>Max<br><br><br><div class="gmail_quote">2010/7/14 jan-mathijs schoffelen <span dir="ltr"><<a href="mailto:jan.schoffelen@donders.ru.nl">jan.schoffelen@donders.ru.nl</a>></span><br> <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div style="">Hi Max,<div><br></div><div>You may want to have a look at the function ft_megrealign. Alternatively, you could construct a gradiometer structure which contains a meaningful average of the coil positions and orientations.</div> <div><br></div><div>Cheers,</div><div><br></div><div>Jan-Mathijs</div><div><br><div><div><div></div><div class="h5"><div>On Jul 13, 2010, at 9:28 PM, Maximilien Chaumon wrote:</div><br></div></div><blockquote type="cite"> <div><div></div><div class="h5">Hello fieldtripers,<br><br>I've read this topic <a href="https://listserv.surfnet.nl/scripts/wa.cgi?A2=ind1004&L=FIELDTRIP&D=0&P=4576" target="_blank">https://listserv.surfnet.nl/scripts/wa.cgi?A2=ind1004&L=FIELDTRIP&D=0&P=4576</a> which poses the same problem that I'm going to raise now.<br> <br> I have several runs and want to concatenate my data. I understand that I can do ft_appenddata, but that I then loose the sensor positions of the second and subsequent runs.<br>Is there a way to align the head position across runs? Does it make sense to interpolate the data between sensors to align all to the same position?<br> <br>Thanks,<br>Max<br></div></div><p>----------------------------------</p><div class="im"><p>The aim of this list is to facilitate the discussion between users of the FieldTrip toolbox, to share experiences and to discuss new ideas for MEG and EEG analysis.</p> </div><p> <a href="http://listserv.surfnet.nl/archives/fieldtrip.html" target="_blank">http://listserv.surfnet.nl/archives/fieldtrip.html</a></p><p> <a href="http://www.ru.nl/fcdonders/fieldtrip/" target="_blank">http://www.ru.nl/fcdonders/fieldtrip/</a></p> </blockquote></div><br></div><br><br><div> <span style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px;"><div style=""> <div>Dr. J.M. (Jan-Mathijs) Schoffelen </div><div>Donders Institute for Brain, Cognition and Behaviour, <br>Centre for Cognitive Neuroimaging,<br>Radboud University Nijmegen, The Netherlands</div><div><a href="mailto:J.Schoffelen@donders.ru.nl" target="_blank">J.Schoffelen@donders.ru.nl</a></div> <div>Telephone: 0031-24-3668063</div></div></span> </div><br></div><div class="im"><p>----------------------------------</p><p>The aim of this list is to facilitate the discussion between users of the FieldTrip toolbox, to share experiences and to discuss new ideas for MEG and EEG analysis.</p> </div><p> <a href="http://listserv.surfnet.nl/archives/fieldtrip.html" target="_blank">http://listserv.surfnet.nl/archives/fieldtrip.html</a></p><p> <a href="http://www.ru.nl/fcdonders/fieldtrip/" target="_blank">http://www.ru.nl/fcdonders/fieldtrip/</a></p> </blockquote></div><br><p>----------------------------------</p><p>The aim of this list is to facilitate the discussion between users of the FieldTrip toolbox, to share experiences and to discuss new ideas for MEG and EEG analysis.</p><p> <a href="http://listserv.surfnet.nl/archives/fieldtrip.html">http://listserv.surfnet.nl/archives/fieldtrip.html</a></p><p> <a href="http://www.ru.nl/fcdonders/fieldtrip/">http://www.ru.nl/fcdonders/fieldtrip/</a></p> </blockquote></div><br><div apple-content-edited="true"> <span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div>Dr. J.M. (Jan-Mathijs) Schoffelen </div><div>Donders Institute for Brain, Cognition and Behaviour, <br>Centre for Cognitive Neuroimaging,<br>Radboud University Nijmegen, The Netherlands</div><div><a href="mailto:J.Schoffelen@donders.ru.nl">J.Schoffelen@donders.ru.nl</a></div><div>Telephone: 0031-24-3668063</div></div></span> </div><br></div></body></html><p>----------------------------------</p>
<p>The aim of this list is to facilitate the discussion between users of the FieldTrip toolbox, to share experiences and to discuss new ideas for MEG and EEG analysis.</p>
<p> http://listserv.surfnet.nl/archives/fieldtrip.html</p>
<p> http://www.ru.nl/fcdonders/fieldtrip/</p>