Publikation: High temperature RF SQUIDs for biomedical applications
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The authors have been investigating the feasibility of radio-frequency RF, low-noise superconducting quantum interference device (SQUID) magnetometers and gradiometers operating in liquid nitrogen at 77 K. Using flux-focusing structures fabricated from epitaxial YBa2Cu3O7-x films, they have attained a magnetic field resolution for a magnetometer of better than 200 fT Hz-1/2 at less than 1 Hz, i.e. over the low signal-frequency range important for biomedical diagnostics. At 77 K, this magnetometer recorded diagnostically useful heart signals, voluntary eye-blink signals and also the first evoked response of a human brain. These and similar results were obtained in a magnetically shielded room. The authors were also able to record heart signals in the absence of any shielding when using a first-order gradiometer. An improvement in the magnetic field resolution of the magnetometers and gradiometers by, at least, another order of magnitude is possible and probable.
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ZHANG, Yi, Yuri TAVRIN, Michael MÜCK-WEYMANN, Alex I. BRAGINSKI, Christoph HEIDEN, Thomas ELBERT, Sarah HAMPSON, 1993. High temperature RF SQUIDs for biomedical applications. In: Physiological Measurement. 1993, 14(2), pp. 113-119. Available under: doi: 10.1088/0967-3334/14/2/002BibTex
@article{Zhang1993tempe-10161, year={1993}, doi={10.1088/0967-3334/14/2/002}, title={High temperature RF SQUIDs for biomedical applications}, number={2}, volume={14}, journal={Physiological Measurement}, pages={113--119}, author={Zhang, Yi and Tavrin, Yuri and Mück-Weymann, Michael and Braginski, Alex I. and Heiden, Christoph and Elbert, Thomas and Hampson, Sarah} }
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