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Improvement of Ultra-Low Field Magnetic Resonance Recordings With a Multilayer Flux-Transformer-Based High-TC SQUID Magnetometerстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 19 июля 2013 г.
- Авторы: Chukharkin M., Kalabukhov A., Schneiderman J.F., Öisjöen F., Jönsson M., Xie M., Snigirev O.V., Winkler D.
- Журнал: IEEE Transactions on Applied Superconductivity
- Том: 23
- Год издания: 2013
- Издательство: Institute of Electrical and Electronics Engineers
- Местоположение издательства: Piscataway, NJ, United States
- Первая страница: 1602704
- DOI: 10.1109/TASC.2012.2234332
- Аннотация: We have developed a multilayer flux-transformer-based high-$T_{rm C}$ SQUID (flip-chip) magnetometer that improves signal-to-noise-ratios (SNR) in ultra-low field magnetic resonance (ulf-MR) recordings of protons in water. Direct ulf-MR-based benchmarking of the flip-chip versus a standard planar high-$T_{rm C}$ SQUID magnetometer resulted in improvement of the SNR by a factor of 2. This gain is attributable to the improved transformation coefficient (1.9 vs 5.3 $hbox{nT}/Phi_{0}$) that increased the signal available to the flip-chip sensor and to the lower noise at the measurement frequency (15 vs 25 $hbox{fT/Hz}^{1/2}$ at 4 kHz). The improved SNR can lead to better spectroscopic resolution, lower imaging times, and higher resolution in ulf-MR imaging systems based on high- $T_{rm C}$ SQUID technology. The experimental details of the sensors, calibration, and ulf-MR benchmarking are presented in this report.
- Добавил в систему: Калабухов Алексей Сергеевич