Development of SQUID-Based Compact Low-Field MRI System
Development of SQUID-Based Compact Low-Field MRI System
复制标题
基于SQUID的紧凑型低场MRI系统的开发
DOI：
10.1109/tasc.2012.2236873
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发表时间：
2013
影响因子：
1.8
通讯作者：
G. Uehara
中科院分区：
文献类型：
--
作者：
D. Oyama;J. Hatta;M. Miyamoto;Y. Adachi;J. Kawai;M. Higuchi;G. Uehara
我们开发了一种紧凑的低场磁共振成像(MRI)系统，该系统可以与脑磁图系统集成，以便于同时测量小动物的脑磁图和MRI。探测核磁共振信号的超导量子干涉器件梯度仪采用带通型锁磁环工作，改善了极化场衰减产生的伪影。我们的磁共振成像系统包括一个桌面大小的平面线圈组(350×350×188 mm~3)。它有五对线圈：一对用于极化场的圆柱形线圈和四对用于测量场和三维梯度场的屏蔽平面线圈。由于靶场方法产生的线圈图案优美，在直径40 mm的球体体积(DSV)上，磁场的均匀性低于±0.2%。设计了用于检测自旋回波信号的脉冲序列，用于二维傅立叶成像。获得了41 mm的视场，像素尺寸为1.3 mm。我们使用2×103mm3的NiCl2水溶液产生的体模进行了二维成像测量，并获得了清晰的图像。
We have developed a compact low-field magnetic resonance imaging (MRI) system that can be integrated with a magnetoencephalography system to facilitate the simultaneous measurement of magnetoencephalography and MRI for small animals. The superconducting quantum interference device gradiometer that detects the nuclear magnetic resonance signal was operated by a band-pass type flux-locked loop, and the artifact produced by the decay of the polarizing field was improved. Our MRI system includes a desktop-sized planar coil set (350 × 350 × 188 mm3). It has five pairs of coils: a pair of cylindrical coils for the polarizing field and four pairs of shielded planar coils for the measurement field and the 3-D gradient fields. On account of the grace of the coil patterns that were created by a target field method, the homogeneities of the magnetic field were below ±0.2% over 40 mm diameter sphere volume (DSV). The pulse sequence to detect the spin-echo signal was designed for 2-D Fourier imaging. A 41-mm field-of-view with a pixel size of 1.3 mm was achieved. We carried out a 2-D imaging measurement using a phantom created by a 2 × 103 mm3 NiCl2 aqueous solution and obtained a clear image.
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.
无创 MEG 测量豚鼠和小鼠皮质对声音的反应。
DOI：
--
发表时间：
2010
期刊：
Association for Research in Otolaryngology Midwinter Meeting
影响因子：
--
作者：
De Cheveigne A
通讯作者：
De Cheveigne A