skip to main content
Ngôn ngữ:
Giới hạn tìm kiếm: Giới hạn tìm kiếm: Dạng tài nguyên Hiển thị kết quả với: Hiển thị kết quả với: Chỉ mục

Source Reconstruction Accuracy of MEG and EEG Bayesian Inversion Approaches

Belardinelli, Paolo ; Ortiz, Erick ; Barnes, Gareth ; Noppeney, Uta ; Preissl, Hubert; Bourdon, Jérémie (editor)

PLoS ONE, 2012, Vol.7(12) [Tạp chí có phản biện]

E-ISSN: 1932-6203 ; DOI: 10.1371/journal.pone.0051985 ; PMCID: 3527408 ; PMID: 23284840

Toàn văn sẵn có

Trích dẫn Trích dẫn bởi
  • Nhan đề:
    Source Reconstruction Accuracy of MEG and EEG Bayesian Inversion Approaches
  • Tác giả: Belardinelli, Paolo ; Ortiz, Erick ; Barnes, Gareth ; Noppeney, Uta ; Preissl, Hubert
  • Bourdon, Jérémie (editor)
  • Chủ đề: Research Article ; Biology ; Computer Science ; Mathematics ; Medicine
  • Là 1 phần của: PLoS ONE, 2012, Vol.7(12)
  • Mô tả: Electro- and magnetoencephalography allow for non-invasive investigation of human brain activation and corresponding networks with high temporal resolution. Still, no correct network detection is possible without reliable source localization. In this paper, we examine four different source localization schemes under a common Variational Bayesian framework. A Bayesian approach to the Minimum Norm Model (MNM), an Empirical Bayesian Beamformer (EBB) and two iterative Bayesian schemes (Automatic Relevance Determination (ARD) and Greedy Search (GS)) are quantitatively compared. While EBB and MNM each use a single empirical prior, ARD and GS employ a library of anatomical priors that define possible source configurations. The localization performance was investigated as a function of (i) the number of sources (one vs . two vs . three), (ii) the signal to noise ratio (SNR; 5 levels) and (iii) the temporal correlation of source time courses (for the cases of two or three sources). We also tested whether the use of additional bilateral priors specifying source covariance for ARD and GS algorithms improved performance. Our results show that MNM proves effective only with single source configurations. EBB shows a spatial accuracy of few millimeters with high SNRs and low correlation between sources. In contrast, ARD and GS are more robust to noise and less affected by temporal correlations between sources. However, the spatial accuracy of ARD and GS is generally limited to the order of one centimeter. We found that the use of correlated covariance priors made no difference to ARD/GS performance.
  • Số nhận dạng: E-ISSN: 1932-6203 ; DOI: 10.1371/journal.pone.0051985 ; PMCID: 3527408 ; PMID: 23284840

Đang tìm Cơ sở dữ liệu bên ngoài...