[FieldTrip] Interpolate sources to the grey matter only

[Schoffelen, J.M. (Jan Mathijs)]

Hi Rowen,

Your question is a bit underspecified, so it’s hard to comment on this with specific hints/tips/tricks, so the best thing that you can get right now from the community is some very generic pointers.

In general, ft_sourceinterpolate is your friend if you want to interpolate the functional data onto the anatomical volume. However, the function does not ‘know’ about which part of the anatomical volume correspond to grey matter, so if you want to mask your interpolated functional data, you’d need to create a grey matter mask, using ft_volumesegment.

Best wishes,
Jan-Mathijs



On 3 Oct 2020, at 05:58, Yun Zhao <Yun.Zhao1 at monash.edu<mailto:Yun.Zhao1 at monash.edu>> wrote:

Hello everyone,

As I'm new to fieldtrip, here is one of the problems I encountered recently. What I have is functional and anatomical data. The functional data is computed for each source point (I have the grid points' coordinates) and the anatomical data is MRI for every subject.

What I want to do is interpolating the functional data to the grey matter of the anatomy. I have tried ft_sourceinterpolate but it doesn't seem the method has an option for interpolating things on grey matter only.

I'm wondering if someone knows how to achieve this. Or I'd try DIY. Thanks in advance.

Kind regards,
Rowen
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