<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Hi,<div class="">I’m not sure I understood your question but if your mri is missing description of the coordsys but you know it, you could define it yourself by e.g. mri.coordsys = ’mni’. Alternatively you will be asked to define the directions of the x,y,z axes. Information about that can be found here:</div><div class=""><a href="http://www.fieldtriptoolbox.org/faq/how_are_the_different_head_and_mri_coordinate_systems_defined" class="">http://www.fieldtriptoolbox.org/faq/how_are_the_different_head_and_mri_coordinate_systems_defined</a></div><div class=""><br class=""></div><div class="">As such FieldTrip does not modify the head model coordsys at all. The head model is based on the coordsys defined by the input mri.</div><div class="">good luck</div><div class="">tzvetan</div><div class=""><br class=""></div><div class=""><div><br class=""><blockquote type="cite" class=""><div class="">Am 10.01.2018 um 09:53 schrieb Fereshte <<a href="mailto:fereshte.ramezani@gmail.com" class="">fereshte.ramezani@gmail.com</a>>:</div><br class="Apple-interchange-newline"><div class=""><div class="">Dear Txvetan,</div><div class="">Thank you for your answer. How does the filedtrip modify the head model coordinate system if no coordinate is defined for the mri image given (to make the FEM head model) by user? </div><div class="">Thanks in advance!</div><div class="">Regards,</div><div class="">Fereshte <br class=""><div class="gmail_quote"><div class="">On Mon, Jan 8, 2018 at 11:41 AM Tzvetan Popov <<a href="mailto:tzvetan.popov@uni-konstanz.de" class="">tzvetan.popov@uni-konstanz.de</a>> wrote:<br class=""></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word;line-break:after-white-space" class="">Hi Fereshte,<div class=""><br class=""></div><div class="">this is the relevant tutorial that’d help you out: <a href="http://www.fieldtriptoolbox.org/tutorial/sourcemodel#subject-specific_grids_that_are_equivalent_across_subjects_in_normalized_space" target="_blank" class="">http://www.fieldtriptoolbox.org/tutorial/sourcemodel#subject-specific_grids_that_are_equivalent_across_subjects_in_normalized_space</a></div><div class="">good luck</div><div class="">tzvetan</div><div class=""><br class=""><div class=""><br class=""><blockquote type="cite" class=""></blockquote></div></div></div><div style="word-wrap:break-word;line-break:after-white-space" class=""><div class=""><div class=""><blockquote type="cite" class=""><div class="">Am 08.01.2018 um 08:12 schrieb Fereshte <<a href="mailto:fereshte.ramezani@gmail.com" target="_blank" class="">fereshte.ramezani@gmail.com</a>>:</div><br class="m_-2195247214389158155Apple-interchange-newline"></blockquote></div></div></div><div style="word-wrap:break-word;line-break:after-white-space" class=""><div class=""><div class=""><blockquote type="cite" class=""><div class="">Dear Experts,<div class="">How can I align a predefined grid source model to an existing head model? ( I have aligned the electrodes to  the headmodel manually but I'm not sure how to align a dipole position on the headmodel).</div><div class="">Looking forward to hearing from you!</div><div class="">Regards,</div><div class="">Fereshte Ramezani </div></div></blockquote></div></div></div><div style="word-wrap:break-word;line-break:after-white-space" class=""><div class=""><div class=""><blockquote type="cite" class=""><div class="">
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