Long range strain measurement is presented by OFDR employing wide and rapid wavelength swept light source. The measurement range of ~1000 µε with µε-level accuracy is achieved over 140 m, potentially at 150 Hz.
In this paper, we present a method for reconstructing the dipole sources inside the human brain from radial Magnetoencephalography data measured on the part of the boundary which encloses the source. Combining the proposed method with the direct method provides a good initial solution for an optimization-based algorithm. The method is verified with the numerical simulations, phantom experiments, and a somatosensory evoked field data analysis.
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