Introduction¶
meica
preprocesses multi-echo datasets and applies multi-echo ICA based
on spatially concatenated echoes. It does so in the following steps:
- Calculates motion parameters based on images with highest contrast (usually the first echo)
- Applies motion correction and T2*-weighted co-registration parameters
- Applies standard EPI preprocessing (slice-time correction, etc.)
- Computes PCA and ICA in conjunction with TE-dependence analysis
Derivatives¶
medn
- ‘Denoised’ BOLD time series after: basic preprocessing, T2* weighted averaging of echoes (i.e. ‘optimal combination’), ICA denoising. Use this dataset for task analysis and resting state time series correlation analysis.
tsoc
- ‘Raw’ BOLD time series dataset after: basic preprocessing and T2* weighted averaging of echoes (i.e. ‘optimal combination’). ‘Standard’ denoising or task analyses can be assessed on this dataset (e.g. motion regression, physio correction, scrubbing, etc.) for comparison to ME-ICA denoising.
*mefc
- Component maps (in units of delta S) of accepted BOLD ICA components. Use this dataset for ME-ICR seed-based connectivity analysis.
mefl
- Component maps (in units of delta S) of ALL ICA components.
ctab
- Table of component Kappa, Rho, and variance explained values, plus listing of component classifications.