Publikation: Magnetoencephalography Using High Temperature rf SQUIDs
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We have developed high-critical-temperature radio-frequency Super conducting QUantum Interference Devices (SQUIDs) with step-edge grain-boundary Josephson junctions and large flux focusers. These planar devices were fabricated from epitaxial YBa2Cu3O7 films and operated in the magnetometer and first-order gradiometer configurations while immersed in liquid nitrogen. At the temperature of 77K, we have attained a magnetic field resolution for the magnetometer better than 200 fT/Hz1/2 down to less than 1 Hz, i.e., over the low signal frequency range important for medical diagnostics. The results to date show a high promise for biomagnetic diagnostics. For the first time, we recorded the evoked responses from human brains using a high-temperature magnetometer and a first-order electronic gradiometer channel simultaneously. These results were obtained in a magnetically shielded room. An improvement in the magnetic field resolution by another order of magnitude is possible and probable.
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ZHANG, Yi, Yuri TAVRIN, Michael MÜCK-WEYMANN, Alex I. BRAGINSKI, Christoph HEIDEN, Sarah HAMPSON, Christo PANTEV, Thomas ELBERT, 1993. Magnetoencephalography Using High Temperature rf SQUIDs. In: Brain Topography. 1993, 5(4), pp. 379-382. Available under: doi: 10.1007/BF01128694BibTex
@article{Zhang1993Magne-10699, year={1993}, doi={10.1007/BF01128694}, title={Magnetoencephalography Using High Temperature rf SQUIDs}, number={4}, volume={5}, journal={Brain Topography}, pages={379--382}, author={Zhang, Yi and Tavrin, Yuri and Mück-Weymann, Michael and Braginski, Alex I. and Heiden, Christoph and Hampson, Sarah and Pantev, Christo and Elbert, Thomas} }
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