Inverse problem

Multi-Angular Electroretinography (maERG): Topographic mapping of the retinal function combining real and virtual electrodes

Author(s): Mercedes Gauthier, Antoine Brassard-Simard, Mathieu Gauvin, Pierre Lachapelle, Jean-Marc Lina
Multi-Angular Electroretinography (maERG): Topographic mapping of the retinal function combining real and virtual electrodes 170 177 IEEE Transactions on Biomedical Engineering (TBME)
This work aims to create a functional retinal map, to locate potential areas of diseased retina. To do so, we created a new electroretinogram recording method which increases the number of recording electrodes around the eye from only a few real ones, by simply moving the gaze. We show that, by solving the inverse problem with an eye model, we can recreate the retinal activity that would have produced the many signals obtained. We present the best recording method and requirements needed for our novel technique to reliably reproduce the retina’s topographic activity, which should improve disease detection and follow-up. read more

Electromagnetic Brain Source Imaging by Means of a Robust Minimum Variance Beamformer

Author(s): Seyed Amir Hossein Hosseini, Abbas Sohrabpour, Mehmet Akçakaya, Bin He
Electromagnetic Brain Source Imaging by Means of a Robust Minimum Variance Beamformer 170 177 IEEE Transactions on Biomedical Engineering (TBME)

Adaptive beamformer methods have been used extensively for functional brain imaging using EEG/MEG surface recordings. However, the sensitivity of beamformers to model mismatches impedes their widespread application, in practice. In…

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