FACET – a -Flexible Artifact Correction and Evaluation Toolbox- for concurrently recorded EEG-fMRI dataReport as inadecuate

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BMC Neuroscience

, 14:138

Computational and theoretical neuromodeling


BackgroundIn concurrent EEG-fMRI recordings, EEG data are impaired by the fMRI gradient artifacts which exceed the EEG signal by several orders of magnitude. While several algorithms exist to correct the EEG data, these algorithms lack the flexibility to either leave out or add new steps. The here presented open-source MATLAB toolbox FACET is a modular toolbox for the fast and flexible correction and evaluation of imaging artifacts from concurrently recorded EEG datasets. It consists of an Analysis, a Correction and an Evaluation framework allowing the user to choose from different artifact correction methods with various pre- and post-processing steps to form flexible combinations. The quality of the chosen correction approach can then be evaluated and compared to different settings.

ResultsFACET was evaluated on a dataset provided with the FMRIB plugin for EEGLAB using two different correction approaches: Averaged Artifact Subtraction AAS, Allen et al., NeuroImage 122:230–239, 2000 and the FMRI Artifact Slice Template Removal FASTR, Niazy et al., NeuroImage 283:720–737, 2005. Evaluation of the obtained results were compared to the FASTR algorithm implemented in the EEGLAB plugin FMRIB. No differences were found between the FACET implementation of FASTR and the original algorithm across all gradient artifact relevant performance indices.

ConclusionThe FACET toolbox not only provides facilities for all three modalities: data analysis, artifact correction as well as evaluation and documentation of the results but it also offers an easily extendable framework for development and evaluation of new approaches.

Electronic supplementary materialThe online version of this article doi:10.1186-1471-2202-14-138 contains supplementary material, which is available to authorized users.

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Author: Johann Glaser - Roland Beisteiner - Herbert Bauer - Florian Ph S Fischmeister

Source: https://link.springer.com/

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