Cortical Source Localization and Signal Estimation Without Exact Knowledge of the Leadfield Matrix
Rabiya Momin, Hasan Mir, Hasan A. Al-Nashash · IEEE Sensors Journal · 2016
This paper develops an iterative algorithm for cerebral activity localization and signal estimation when exact knowledge of the leadfield matrix is not available. The algorithm exploits a high resolution localization technique that can determine the number of sources and their locations. A beamformer is designed in order to estimate the dipole source amplitudes, and the EEG signal is reconstructed via a calibration matrix. The performance of the algorithm is quantified in terms of the localization error and the accuracy is validated by applying it to experimental data.