A novel whole-head RF coil design tailored for concurrent multichannel brain stimulation and imaging at 3T.
A novel whole-head RF coil design tailored for concurrent multichannel brain stimulation and imaging at 3T.
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DOI：
10.1016/j.brs.2023.05.025
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发表时间：
2023-07
影响因子：
7.7
通讯作者：
Nummenmaa, Aapo
中科院分区：
文献类型：
--
作者：
Lara, Lucia I. Navarro de;Stockmann, Jason P.;Meng, Qinglei;Keil, Boris;Mareyam, Azma;Uluc, Isil;Daneshzand, Mohammad;Makarov, Sergey;Wald, Lawrence L.;Nummenmaa, Aapo
多通道经颅磁刺激 (mTMS) 是一种新颖的非侵入性脑刺激技术，允许在电子控制下同时或顺序刺激多个部位，而无需移动线圈。为了实现同时 mTMS 和 MR 成像，我们设计并构建了一个 3T 的全头 28 通道仅接收 RF 线圈。考虑到 mTMS 系统的特定布局，设计了头盔形结构，该系统带有用于将 TMS 单元定位在头皮附近的孔。 TMS 单元的直径定义了 RF 环路的直径。前置放大器的放置旨在最大限度地减少可能的相互作用，并允许将 mTMS 单元直接定位在射频线圈周围。对全头部系统的 TMS-MRI 之间的相互作用进行了分析，扩展了之前出版物中提出的结果。获得 SNR 和 g 因子图，以将线圈的成像性能与商用头部线圈进行比较。包含 TMS 单元的 RF 元件的灵敏度损失显示出明确的空间模式。仿真表明，损耗主要是由线圈绕组上的涡流引起的。 TMSMR 28 通道线圈的平均 SNR 性能分别约为 32/20 通道头部线圈 SNR 的 66% 和 86%。 TMSMR 28 通道线圈的 g 因子值与 32 通道线圈相似，并且明显优于 20 通道线圈。我们推出了 TMSMR 28 通道线圈，这是一种与多通道 3 轴 TMS 线圈系统集成的头部射频线圈阵列，这是一种能够对人脑功能进行因果映射的新型工具。
Multichannel Transcranial Magnetic Stimulation (mTMS) is a novel non-invasive brain stimulation technique allowing multiple sites to be stimulated simultaneously or sequentially under electronic control without movement of the coils. To enable simultaneous mTMS and MR imaging, we have designed and constructed a whole-head 28-channel receive-only RF coil at 3T. A helmet-shaped structure was designed considering a specific layout for a mTMS system with holes for positioning the TMS units next to the scalp. Diameter of the TMS units defined the diameter of RF loops. The placement of the preamplifiers was designed to minimize possible interactions and to allow straightforward positioning of the mTMS units around the RF coil. Interactions between TMS-MRI were analyzed for the whole-head system extending the results presented in previous publications. Both SNR- and g-factors maps were obtained to compare the imaging performance of the coil with commercial head coils. Sensitivity losses for the RF elements containing TMS units show a well-defined spatial pattern. Simulations indicate that the losses are predominantly caused by eddy currents on the coil wire windings. The average SNR performance of the TMSMR 28-channel coil is about 66% and 86% of the SNR of the 32/20-channel head coil respectively. The g-factor values of the TMSMR 28-channel coil are similar to the 32-channel coil and significantly better than the 20-channel coil. We present the TMSMR 28-channel coil, a head RF coil array to be integrated with a multichannel 3-axisTMS coil system, a novel tool that will enable causal mapping of human brain function.
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影响因子：
3.3
作者：
Keil, Boris;Blau, James N.;Biber, Stephan;Hoecht, Philipp;Tountcheva, Veneta;Setsompop, Kawin;Triantafyllou, Christina;Wald, Lawrence L.
通讯作者：
Wald, Lawrence L.
影响因子：
10.6
作者：
Bohning, DE;Shastri, A;George, MS
通讯作者：
George, MS
影响因子：
3.3
作者：
JEZZARD, P;BALABAN, RS
通讯作者：
BALABAN, RS
影响因子：
7.7
作者：
Roth, Yiftach;Levkovitz, Yechiel;Zangen, Abraham
通讯作者：
Zangen, Abraham
影响因子：
4.4
作者：
In, Myung-Ho;Tan, Ek Tsoon;Bernstein, Matt A.
通讯作者：
Bernstein, Matt A.