Abstract：
:Electromagnetic brain imaging is the reconstruction of brain activity from non-invasive recordings of the magnetic fields and electric potentials. An enduring challenge in this imaging modality is estimating the number, location, and time course of sources, especially for the reconstruction of distributed brain sources with complex spatial extent. Here, we introduce a novel robust empirical Bayesian algorithm that enables better reconstruction of distributed brain source activity with two key ideas: kernel smoothing and hyperparameter tiling. Since the proposed algorithm builds upon many of the performance features of the sparse source reconstruction algorithm - Champagne and we refer to this algorithm as Smooth Champagne. Smooth Champagne is robust to the effects of high levels of noise, interference, and highly correlated brain source activity. Simulations demonstrate excellent performance of Smooth Champagne when compared to benchmark algorithms in accurately determining the spatial extent of distributed source activity. Smooth Champagne also accurately reconstructs real MEG and EEG data.
journal_name
IEEE Trans Med Imagingjournal_title
IEEE transactions on medical imagingauthors
Cai C,Diwakar M,Chen D,Sekihara K,Nagarajan SSdoi
10.1109/TMI.2019.2932290subject
Has Abstractpub_date
2020-03-01 00:00:00pages
567-577issue
3eissn
0278-0062issn
1558-254Xjournal_volume
39pub_type
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