Ultra-sensitive SQUID instrumentation for MEG and NCI by ULF MRI
作者： Rainer Körber
DOI: 10.1007/978-981-10-5122-7_199
关键词: Instrumentation (computer programming) 、 Biomagnetism 、 Physics 、 Hybrid system 、 Acoustics 、 Current density imaging 、 Electromagnetic coil 、 Noise (electronics) 、 Squid 、 Sensitivity (control systems)
摘要: The requirements for the construction of ultra-sensitive SQUID instrumentation as used in biomagnetism are presented. Typically, SQUIDs inductively coupled to pick-up coils and this arrangement one can improve noise performance by increasing sensing coil area. To achieve optimum sensitivity has consider signal-to-noise ratio (SNR), which is an intricate interplay between source characteristics origin. It turns out that separate designs needed various even identical source. Hence, a hybrid system with differently sized presents best option multipurpose applications. A single channel close intrinsic level also described. This possible utilizing special dewar design thereby enabling further increase SNR. Such might be current density imaging neuronal ultra-low-field magnetic resonance where it must able field-tolerant up 100-200 mT.
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