Ultra-sensitive SQUID instrumentation for MEG and NCI by ULF MRI
Ultra-sensitive SQUID instrumentation for MEG and NCI by ULF MRI
复制标题
用于 MEG 和 NCI 的 ULF MRI 超灵敏 SQUID 仪器
DOI:
10.1007/978-981-10-5122-7_199
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发表时间:
2018
期刊:
影响因子:
--
通讯作者:
R. Körber
中科院分区:
文献类型:
--
作者:
R. Körber
The requirements for the construction of ultra-sensitive SQUID instrumentation as used in biomagnetism are presented. Typically, SQUIDs are inductively coupled to pick-up coils and for this arrangement one can improve the noise performance by increasing the sensing coil area. To achieve optimum sensitivity one has to consider the signal-to-noise ratio (SNR), which is an intricate interplay between source characteristics and noise origin. It turns out that separate pick-up coil designs are needed for various noise characteristics even for an identical source. Hence, a hybrid system with differently sized pick-up coils presents the best option for multipurpose applications. A single channel system with close to SQUID intrinsic noise level is also described. This is possible by utilizing a special dewar design and thereby enabling a further increase in SNR. Such a system might be used for current density imaging and neuronal current imaging by ultra-low-field magnetic resonance where it also must be able to be field-tolerant to up to 100-200 mT.
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影响因子:
4.6
作者:
AHONEN, AI;HAMALAINEN, MS;VILKMAN, VA
通讯作者:
VILKMAN, VA
DOI:
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发表时间:
2016
期刊:
影响因子:
--
作者:
J. Storm;D. Drung;M. Burghoff;Rainer Korber
通讯作者:
Rainer Korber
DOI:
--
发表时间:
2006
期刊:
影响因子:
--
作者:
J. Clarke;A. Braginski
通讯作者:
A. Braginski
影响因子:
3.6
作者:
通讯作者:
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