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Possible to restrict beamformer output to labels?

See original GitHub issue

Is there a reason the lcmv beamformer apply methods (apply_lcmv_epochs, apply_lcmv_raw, apply_lcmv_cov) don’t support restricting to Label?

It seems like once the filter weights are made restricting to source locations inside a label shouldn’t affect the results.

CC @britta-wstnr

Issue Analytics

State:
Created 3 years ago
Comments:7 (7 by maintainers)

Top GitHub Comments

1reaction

larsonercommented, Nov 13, 2020

Does this mean that I could end up with having the same grid point belong to different labels based on the interpolation that’s been done?

Yep:

With mri_resolution=False each grid point will contribute to at most one label, and some labels might have zero grid points contributing to them.
With mri_resolution=True each grid point can contribute to multiple labels (determined by trilinear upsampling from the low-res to high-res space where the labels live), and all labels will have grid points.

0reactions

britta-wstnrcommented, Nov 13, 2020

@larsoner Does this mean that I could end up with having the same grid point belong to different labels based on the interpolation that’s been done?

At least from the beamformer perspective, there should not be any problem in applying or even calculating the filter for a subset of grid points only, since the weights are calculated for each grid point independently (as long as forward model and covariance matrix do not change, that is).

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