<div dir="ltr"><div dir="auto"><div dir="ltr" style="font-family:sans-serif;font-size:13.696px">Hi Fieldtrippers<div><br></div><div>I want to reconstruct cortical sources using a freesurfer surface, rather than an equidistant grid I will use the points from the surface. To do so I use ft_read_headshape to read the .surf file and use it as the points for the leadfield. However, the MEG data and headmodel are in 'bti' coordinates thus the grid points are not aligned to the headmodel and sensor points. </div><div><br></div><div>I read the minimum norm estimate tutorial from fieldtrip webpage for transforming spm coordinates to bti, but in my case I am using a surface file in which there are only the points and tri.gonometries and the tutorial doesn't apply.</div><div><br></div><div>How can I convert the surface points to bti? This is HCP data and I thought I would find some help on this somewhere but couldn't.</div><div><br></div><div><br></div><div>Cheers,</div><div dir="auto"><br></div><div dir="auto">Nick</div></div><br></div>
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