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- W2979522017 abstract "The tracking of dynamic functional connectivity (dFC) states in resting-state fMRI scans aims to reveal how the brain sequentially processes stimuli and thoughts. Despite the recent advances in statistical methods, estimating the high dimensional dFC states from a small number of available time points remains a challenge. This paper shows that the challenge is reduced by linear covariance shrinkage, a statistical method used for the estimation of large covariance matrices from small number of samples. We present a computationally efficient formulation of our approach that scales dFC analysis up to full resolution resting-state fMRI scans. Experiments on synthetic data demonstrate that our approach produces dFC estimates that are closer to the ground-truth than state-of-the-art estimation approaches. When comparing methods on the rs-fMRI scans of 162 subjects, we found that our approach is better at extracting functional networks and capturing differences in rs-fMRI acquisition and diagnosis." @default.
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- W2979522017 date "2019-01-01" @default.
- W2979522017 modified "2023-10-16" @default.
- W2979522017 title "Covariance Shrinkage for Dynamic Functional Connectivity" @default.
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- W2979522017 doi "https://doi.org/10.1007/978-3-030-32391-2_4" @default.
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