[FieldTrip] Problems with ft_prepare_headmodel

[Uri Eduardo Ramírez Pasos]

Dear Tzvetan,

That worked perfectly, thank you! Are there guidelines for use of mesh
inflation? E.g., does dilation by two voxels greatly bias source
reconstruction? If one inflates a subject's mesh, must one then inflate all
other subjects' meshes to the same degree?

Thank you again,
Uri

2018-07-02 16:54 GMT+02:00 Tzvetan Popov <tzvetan.popov at uni-konstanz.de>:

> Dear Uri,
>
> the solution to the problem (mesh inflation) is outlined in this tutorial:
> http://www.fieldtriptoolbox.org/tutorial/natmeg/
> dipolefitting?s[]=natmeg&s[]=headmodel#procedure
>
> Scroll down to the section "Construct the EEG volume conduction model"
> <http://www.fieldtriptoolbox.org/tutorial/natmeg/dipolefitting?s[]=natmeg&s[]=headmodel#construct_the_eeg_volume_conduction_model>
> Good luck,
> tzvetan
>
>
> Am 02.07.2018 um 14:37 schrieb Uri Eduardo Ramírez Pasos <
> urieduardo at gmail.com>:
>
> Dear Fieldtrippers,
>
> I have followed the Salzburg tutorial (http://www.fieldtriptoolbox.o
> rg/tutorial/salzburg) to conduct EEG source reconstruction, but it
> doesn't work with some subjects' segmented mri files (whether I use dipoli
> or bemcp), due to intersections between surfaces.
>
> What are the typical trouble-shooting steps for this situation? I tried
> using a lower number of vertices for the mesh ([800 800 600]), to no avail.
> Are there any guidelines for the number of vertices?
>
> The number of subjects in my study is limited, so I would be loathe to
> exclude any subject from the analysis.
>
> Best regards,
>
> Uri Ramirez
> University of Würzburg
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