Multi-flux-transformer MRI detection with an atomic magnetometer.
Multi-flux-transformer MRI detection with an atomic magnetometer.
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DOI：
10.1016/j.jmr.2014.10.009
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发表时间：
2014-12
影响因子：
2.2
通讯作者：
Karaulanovl, Todor
中科院分区：
文献类型：
--
作者：
Savukov, Igor;Karaulanovl, Todor
最近，已经用原子磁力计（AM）演示了解剖超低场（ULF）MRI。通量变压器 (FT) 已用于解耦 MRI 场和梯度，以避免它们对 AM 性能产生负面影响。由于需要在 FT 输入线圈的尺寸和每个体素的 MRI 灵敏度之间进行折衷，因此视野 (FOV) 受到限制。多通道采集是一种众所周知的解决方案，可以在不显着降低灵敏度的情况下增加 FOV。在本文中，我们展示了使用三个 FT 输入线圈可将 FOV 增加两倍。我们还表明，通过沿着检测阵列跨度的方向应用频率编码梯度，可以使用单个原子磁力计和单个采集通道来采集三个独立的 MRI 信号。该方法可以推广到更多通道，对于需要较大视场的非低温 ULF MRI 成像应用（包括头部、手部、脊柱和全身成像）至关重要。
Recently, anatomical ultra-low field (ULF) MRI has been demonstrated with an atomic magnetometer (AM). A flux-transformer (FT) has been used for decoupling MRI fields and gradients to avoid their negative effects on AM performance. The field of view (FOV) was limited because of the need to compromise between the size of the FT input coil and MRI sensitivity per voxel. Multi-channel acquisition is a well-known solution to increase FOV without significantly reducing sensitivity. In this paper, we demonstrate two-fold FOV increase with the use of three FT input coils. We also show that it is possible to use a single atomic magnetometer and single acquisition channel to acquire three independent MRI signals by applying a frequency-encoding gradient along the direction of the detection array span. The approach can be generalized to more channels and can be critical for imaging applications of non-cryogenic ULF MRI where FOV needs to be large, including head, hand, spine, and whole-body imaging.
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影响因子：
2.2
作者：
Savukov, I.;Karaulanov, T.
通讯作者：
Karaulanov, T.
影响因子：
8.6
作者：
Savukov, IM;Romalis, MV
通讯作者：
Romalis, MV
影响因子：
64.8
作者：
Kominis, IK;Kornack, TW;Romalis, MV
通讯作者：
Romalis, MV
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.
影响因子：
8.6
作者：
Savukov, IM;Seltzer, SJ;Sauer, KL
通讯作者：
Sauer, KL