To infer latent brain source activation patterns under different cognitive tasks is an integral step to understand how our brain works. Traditional electroencephalogram (EEG) Source Imaging (ESI) methods usually do not distinguish task-related and spurious non-task-related sources that jointly generate EEG signals, which inevitably yield misleading reconstructed activation patterns. In this research, we assume that the task-related source signal intrinsically has a low-rank property, which is exploited to infer the true task-related EEG sources location. Although the true task-related source signal is sparse and low-rank, the contribution of spurious sources scattering over the source space with intermittent activation patterns makes the actual source space lose the low-rank property. To reconstruct a low-rank true source, we propose a novel ESI model that involves a spatial low-rank representation and a temporal Laplacian graph regularization, the latter of which guarantees the temporal smoothness of the source signal and eliminate the spurious ones. To solve the proposed model, an augmented Lagrangian objective function is formulated and an algorithm in the framework of alternating direction method of multipliers (ADMM) is proposed. Numerical results illustrate the effectivenesks of the proposed method in terms of reconstruction accuracy with high efficiency.
|Title of host publication||Brain Informatics - International Conference, BI 2018, Proceedings|
|Editors||Yang Yang, Vicky Yamamoto, Shouyi Wang, Erick Jones, Jianzhong Su, Tom Mitchell, Leon Iasemidis|
|Number of pages||13|
|State||Published - 2018|
|Event||International Conference on Brain Informatics, BI 2018 - Arlington, United States|
Duration: Dec 7 2018 → Dec 9 2018
|Name||Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)|
|Conference||International Conference on Brain Informatics, BI 2018|
|Period||12/7/18 → 12/9/18|
Bibliographical noteFunding Information:
Acknowledgment. This work has been partially supported by the NSF funding under grant number CMMI-1537504 and DMS-1522786. The research of Jing Qin is supported by the NSF grant DMS-1818374.
This work has been partially supported by the NSF funding under grant number CMMI-1537504 and DMS-1522786. The research of Jing Qin is supported by the NSF grant DMS-1818374.
© 2018, Springer Nature Switzerland AG.
- Alternating direction method of multiplier (ADMM)
- EEG source imaging
- Graph regularization
- Low rank representation
ASJC Scopus subject areas
- Theoretical Computer Science
- Computer Science (all)