<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  </head>
  <body>
    <p>Hi Bella,</p>
    <p>It's a bit tricky to draw on the surfaces directly.</p>
    <p>What you could do is to run the simulations with map_to_surf set
      to true, so that the e-field is interpolated onto the middle gray
      matter surface. After that, draw the ROI on the MRI volume, i.e.,
      manually create a ROI mask using for example freeview. Once you
      have that, you can use freesurfer's mri_vol2surf to map the volume
      ROI onto the middle gray matter surface, and visualize/analyze the
      e-field within the ROI.</p>
    <p><br>
    </p>
    <p>Best,<br>
      Oula</p>
    <p><br>
    </p>
    <div class="moz-cite-prefix">On 9/2/22 14:32, ZHANG, bellabingbing
      [Student] wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:OS3P286MB1589EC496F1019E22E1E2AA2CA7A9@OS3P286MB1589.JPNP286.PROD.OUTLOOK.COM">
      <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
      <style type="text/css" style="display:none;">P {margin-top:0;margin-bottom:0;}</style>
      <div style="font-family: Arial, Helvetica, sans-serif; font-size:
        12pt; color: rgb(0, 0, 0);" class="elementToProof">
        <span class="x_elementToProof"
          style="font-size:12pt;margin:0px;background-color:rgb(255,
          255, 255)">Dear Dr. Thielscher,</span>
        <div class="x_elementToProof"
          style="font-size:12pt;margin:0px;background-color:rgb(255,
          255, 255)">
          <br>
        </div>
        <div class="x_elementToProof"
          style="font-size:12pt;margin:0px;background-color:rgb(255,
          255, 255)">
          I am a Ph.D student from the Hong Kong Polytechnic University.
          We recently submitted an article to a juornal. However, the
          reviewer suggests we draw the ROI on the figure. Therefore, <span
            style="margin:0px">I would like to visualize the ROI on the
            brain surface after the E_field simulation as follows. Do
            you have any suggestions how could I do this?</span></div>
        <div class="x_elementToProof"
          style="font-size:12pt;margin:0px;background-color:rgb(255,
          255, 255)">
          <img class="x_w-241 x_h-240 ADIae w-241 h-240" size="99441"
            style="margin:0px;animation:0.1s ease-out 0s 1 normal none
            running
ADIae;max-width:100%;cursor:pointer;min-width:auto;min-height:auto;height:auto"
            contenttype="image/png" data-outlook-trace="F:2|T:2"
            src="cid:part1.UeS01hWg.ydAe1W6w@drcmr.dk"><br>
        </div>
        <div class="x_elementToProof"
          style="font-size:12pt;margin:0px;background-color:rgb(255,
          255, 255)">
          <br>
        </div>
        <div class="x_elementToProof"
          style="font-size:12pt;margin:0px;background-color:rgb(255,
          255, 255)">
          Best Regards,</div>
        <span class="x_elementToProof"
          style="font-size:12pt;margin:0px;background-color:rgb(255,
          255, 255)">Bella ZHANG</span><br>
      </div>
      <style type="text/css">p
        {margin-top:12px;
        margin-bottom:12px}div.WordSection1
        {}</style><img alt=""
src="https://www.polyu.edu.hk/emaildisclaimer/85A-PolyU_Email_Signature.jpg"
        moz-do-not-send="true">
      <p><br>
        <em><font size="3" face="Times New Roman">Disclaimer:</font></em></p>
      <p style="margin-left: 0.5in"><i><font size="3" face="Times New
            Roman" color="black"><span>This message (including any
              attachments) contains confidential information intended
              for a specific individual and purpose. If you are not the
              intended recipient, you should delete this message and
              notify the sender and The Hong Kong Polytechnic University
              (the University) immediately. Any disclosure, copying, or
              distribution of this message, or the taking of any action
              based on it, is strictly prohibited and may be unlawful.</span></font></i></p>
      <p style="margin-left: 0.5in"><i><span><font size="3" face="Times
              New Roman">The University specifically denies any
              responsibility for the accuracy or quality of information
              obtained through University E-mail Facilities. Any views
              and opinions expressed are only those of the author(s) and
              do not necessarily represent those of the University and
              the University accepts no liability whatsoever for any
              losses or damages incurred or caused to any party as a
              result of the use of such information.</font></span></i></p>
      <br>
      <fieldset class="moz-mime-attachment-header"></fieldset>
      <pre class="moz-quote-pre" wrap="">_______________________________________________
Simnibs-discuss mailing list
<a class="moz-txt-link-abbreviated" href="mailto:Simnibs-discuss@drcmr.dk">Simnibs-discuss@drcmr.dk</a>
<a class="moz-txt-link-freetext" href="https://mailman.drcmr.dk/mailman/listinfo/simnibs-discuss">https://mailman.drcmr.dk/mailman/listinfo/simnibs-discuss</a>
</pre>
    </blockquote>
  </body>
</html>