All-planar SQUIDs and pickup coils for combined MEG and MRI
All-planar SQUIDs and pickup coils for combined MEG and MRI
复制标题
用于组合 MEG 和 MRI 的全平面 SQUID 和拾波线圈
DOI：
10.1088/0953-2048/24/7/075020
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发表时间：
2011
影响因子：
3.6
通讯作者：
J. Hassel
中科院分区：
文献类型：
--
作者：
J. Luomahaara;P. Vesanen;J. Penttilä;J. Nieminen;J. Dabek;J. Simola;M. Kiviranta;L. Grönberg;C. J. Zevenhoven;R. Ilmoniemi;J. Hassel
磁通捕获和随机磁通运动是超导薄膜器件中常见的问题。基于超导量子干涉器件(SQUID)的超灵敏磁场传感器与大的拾取线圈耦合在一起，特别容易受到强外场的影响。随着基于SQUID的超低场核磁共振(核磁共振)和磁共振成像(MRI)技术的引入，这个问题变得特别相关。在本文中，我们研究了薄膜磁强计和梯度仪在超低频磁共振成像磁场序列中的限制。特别是，我们解决了响应恢复、瞬时噪声、磁化和预极化后在屏蔽室条件下的行为等问题。因此，我们展示了适合组合多通道脑磁图(MEG)和MRI成像系统的传感器。
Flux trapping and random flux movement are common problems in superconducting thin-film devices. Ultrasensitive magnetic field sensors based on superconducting quantum interference devices (SQUIDs) coupled to large pickup coils are especially vulnerable to strong external fields. The issue has become particularly relevant with the introduction of SQUID-based ultra-low-field (ULF) nuclear magnetic resonance (NMR) and magnetic resonance imaging (MRI) techniques. In this paper, we study the constraints of thin-film-based magnetometers and gradiometers as exposed to magnetic field sequences of ULF MRI. In particular, we address issues such as response recovery, transient noise, magnetization and behaviour under shielded room conditions after prepolarization. As a result, we demonstrate sensors that are suitable for a combined multi-channel magnetoencephalography (MEG) and MRI imaging system.
影响因子：
2.2
作者：
Zotev, Vadim S.;Matlashov, Andrei N.;Kraus, Robert H., Jr.
通讯作者：
Kraus, Robert H., Jr.