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Hi Anik,
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<div class="">On 29 May 2019, at 20:36, Anik Das <<a href="mailto:anik.nicks@gmail.com" class="">anik.nicks@gmail.com</a>> wrote:</div>
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<div dir="ltr" class="">I was working with "Creating a BEM volume conduction model of the head for source-reconstruction of EEG data" founded from:
<a href="http://www.fieldtriptoolbox.org/tutorial/headmodel_eeg_bem/" class="">http://www.fieldtriptoolbox.org/tutorial/headmodel_eeg_bem/</a> .I've some questions regarding this</div>
<div class="">1. Is the head-model(only for vol.bnd(3) coordinates) origin in figure is (0,0,0) ?</div>
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<div>Well, the origin by definition is (0,0,0), that’s why it’s called ‘origin’ :). This is independent of the object.</div>
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<div class="">2. if so, does the x, y axis for origin (0,0,0) intersect the points ‘Nz’, ‘LPA’ and ‘RPA’ like ctf coordinate system(<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>
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I don’t know. You can evaluate this yourself, using the ft_determine_coordsys function. To me, it looks as if the coordinate system is acpc-based RAS. But I could be wrong.</div>
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<div>Best wishes,</div>
<div>Jan-Mathijs</div>
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https://doi.org/10.1371/journal.pcbi.1002202<br class="">
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