<div dir="ltr">Hi Thomas,<div><br></div><div>First thing that comes to my mind is step 3 of this ECoG <a href="http://www.fieldtriptoolbox.org/tutorial/human_ecog">tutorial</a>, which demonstrates how to determine the coordinate system of an anatomical image. You'll need Box 2 from the <a href="https://www.biorxiv.org/content/early/2017/12/08/230912.full.pdf+html">preprint</a>, and Video <a href="https://www.youtube.com/watch?v=K9rwGWr-ZnA">1</a>.  Video <a href="https://www.youtube.com/watch?v=KvmilLY9MiE">2</a> addresses your second point, on how to use the coordinate system to find left and right.</div><div><br></div><div>Hope that helps,</div><div>Arjen</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Sat, May 19, 2018 at 7:04 AM, Thomas Radman <span dir="ltr"><<a href="mailto:radman.thomas@gmail.com" target="_blank">radman.thomas@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"><p class="MsoNormal" style="margin:0in 0in 0.0001pt;font-size:12pt;font-family:Calibri,sans-serif;color:rgb(0,0,0);font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none"><span style="font-size:11pt">Hello,<span></span></span></p><p class="MsoNormal" style="margin:0in 0in 0.0001pt;font-size:12pt;font-family:Calibri,sans-serif;color:rgb(0,0,0);font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none"><span style="font-size:11pt"><span> </span></span></p><p class="MsoNormal" style="margin:0in 0in 0.0001pt;font-size:12pt;font-family:Calibri,sans-serif;color:rgb(0,0,0);font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none"><span style="font-size:11pt">I would like to use individual MRIs to perform source analysis on EEG data.  <br></span></p><p class="MsoNormal" style="margin:0in 0in 0.0001pt;font-size:12pt;font-family:Calibri,sans-serif;color:rgb(0,0,0);font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none"><span style="font-size:11pt"><br></span></p><p class="MsoNormal" style="margin:0in 0in 0.0001pt;font-size:12pt;font-family:Calibri,sans-serif;color:rgb(0,0,0);font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none"><span style="font-size:11pt">The
 problem I have is when importing dicoms into fieldtrip, and then using 
ft_determine_coordsys, the coordinate system is not returned.  How can I
 determine the coordinate system and align this to my EEG sensors?</span></p><p class="MsoNormal" style="margin:0in 0in 0.0001pt;font-size:12pt;font-family:Calibri,sans-serif;color:rgb(0,0,0);font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none"><span style="font-size:11pt"><br></span></p><p class="MsoNormal" style="margin:0in 0in 0.0001pt;font-size:12pt;font-family:Calibri,sans-serif;color:rgb(0,0,0);font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none"><span style="font-size:11pt">Also,
 to use ft_volumerealign in interactive mode to select fiducials I need 
to know which side is right and which is left.  Is it possible to do 
this if I did not have a vitamin E marker in my scans?<br></span></p><p class="MsoNormal" style="margin:0in 0in 0.0001pt;font-size:12pt;font-family:Calibri,sans-serif;color:rgb(0,0,0);font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none"><span style="font-size:11pt"><br></span></p><p class="MsoNormal" style="margin:0in 0in 0.0001pt;font-size:12pt;font-family:Calibri,sans-serif;color:rgb(0,0,0);font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none"><span style="font-size:11pt">Thank you,<span></span></span></p><p class="MsoNormal" style="margin:0in 0in 0.0001pt;font-size:12pt;font-family:Calibri,sans-serif;color:rgb(0,0,0);font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none"><span style="font-size:11pt">Tom Radman</span></p><br></div>
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