期刊
IEEE TRANSACTIONS ON MEDICAL IMAGING
卷 39, 期 3, 页码 567-577出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TMI.2019.2932290
关键词
Bayes methods; Kernel; Brain modeling; Image reconstruction; Electroencephalography; Imaging; Electromagnetic brain mapping; Bayesian inference; distributed brain activity; inverse problem; magnetoencephalography; electroencephalography
类别
资金
- NIH [R01EB022717, R01DC013979, R01NS100440, R01DC017696]
- National Natural Science Foundation of China [61772380]
- Major Project for Technological Innovation of Hubei Province [2019AAA044]
- University of California [UCOP-MRP-17-454755]
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.
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