PERFORMANCE OF A HIGH-TEMPERATURE SUPERCONDUCTING RESONATOR FOR HIGH-FIELD IMAGING
PERFORMANCE OF A HIGH-TEMPERATURE SUPERCONDUCTING RESONATOR FOR HIGH-FIELD IMAGING
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DOI：
10.1006/jmra.1995.1058
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发表时间：
1995-03-01
期刊：
影响因子：
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通讯作者：
JOHNSON, GA
中科院分区：
文献类型：
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作者：
BLACK, RD;EARLY, TA;JOHNSON, GA
概述了使用超导显微成像探头的实用性，以便评估与这项技术相关的功率和问题。讨论了这类探头传输特性的非线性、带宽的内在限制、较长的衰荡时间、自旋衰减的可能性以及抑制Johnson噪声的困难，介绍了最近的改进，在室温下相对于铜线圈，信噪比(SNR)提高了30倍，进一步减少噪声源应该会产生60倍的SNR增益。(C)1995年学术出版社。
The practicalities involved with the use of a superconducting microimaging probe are outlined so that the power and problems associated with this technology can be assessed. The nonlinearity of the transmission characteristics of this class of probe, the intrinsic limits on bandwidth, the long ring-down times, the potential for spin damping, and the difficulties of suppressing Johnson noise are all discussed, Recent refinements that have delivered a factor of 30 gain in SNR (signal-to-noise ratio) relative to copper coils at room temperature are presented, Further reductions in noise sources should yield a gain of a factor of 60 in SNR. (C) 1995 Academic Press, Inc.