Enabling ambulatory movement in wearable magnetoencephalography with matrix coil active magnetic shielding.
Enabling ambulatory movement in wearable magnetoencephalography with matrix coil active magnetic shielding.
复制标题
DOI：
10.1016/j.neuroimage.2023.120157
复制
发表时间：
2023-07-01
期刊：
影响因子：
5.7
通讯作者：
Bowtell, Richard
中科院分区：
文献类型：
--
作者：
Holmes, Niall;Rea, Molly;Hill, Ryan M.;Leggett, James;Edwards, Lucy J.;Hobson, Peter J.;Boto, Elena;Tierney, Tim M.;Rier, Lukas;Rivero, Gonzalo Reina;Shah, Vishal;Osborne, James;Fromhold, T. Mark;Glover, Paul;Brookes, Matthew J.;Bowtell, Richard
在参与者动态运动期间收集高质量神经成像数据的能力将使丰富的神经科学范式成为可能。基于光泵磁强计（OPMs）的可穿戴式脑磁图（MEG）有可能允许参与者在扫描期间运动。然而，opm严格的零磁场要求意味着系统必须在磁屏蔽室（MSR）内运行，并且还需要使用电磁线圈进行主动屏蔽，以消除残留场和场变化（由于外部源和传感器运动），否则将妨碍准确的神经元源重建。现有的主动屏蔽系统只补偿小的固定区域的磁场，不允许动态运动。本文介绍了矩阵线圈，一种新型的OPM-MEG有源屏蔽系统，它由48个正方形单位线圈组成，分布在两个平面上，可以在平面之间灵活放置的区域补偿磁场。通过光学跟踪与OPM数据采集的集成，以低延迟（25 ms）消除了参与者运动引起的场变化。尽管存在较大的（65厘米平移和270°旋转）动态参与者运动，但仍收集了高质量的MEG源数据。
The ability to collect high-quality neuroimaging data during ambulatory participant movement would enable a wealth of neuroscientific paradigms. Wearable magnetoencephalography (MEG) based on optically pumped magnetometers (OPMs) has the potential to allow participant movement during a scan. However, the strict zero magnetic field requirement of OPMs means that systems must be operated inside a magnetically shielded room (MSR) and also require active shielding using electromagnetic coils to cancel residual fields and field changes (due to external sources and sensor movements) that would otherwise prevent accurate neuronal source reconstructions. Existing active shielding systems only compensate fields over small, fixed regions and do not allow ambulatory movement. Here we describe the matrix coil, a new type of active shielding system for OPM-MEG which is formed from 48 square unit coils arranged on two planes which can compensate magnetic fields in regions that can be flexibly placed between the planes. Through the integration of optical tracking with OPM data acquisition, field changes induced by participant movement are cancelled with low latency (25 ms). High-quality MEG source data were collected despite the presence of large (65 cm translations and 270°rotations) ambulatory participant movements.
登录
查看更多内容
影响因子：
5.7
作者：
Borna A;Iivanainen J;Carter TR;McKay J;Taulu S;Stephen J;Schwindt PDD
通讯作者：
Schwindt PDD
在头皮安装的磁刻摄影术中用于无效背景磁场的双平面线圈系统。
影响因子：
5.7
作者：
Holmes N;Leggett J;Boto E;Roberts G;Hill RM;Tierney TM;Shah V;Barnes GR;Brookes MJ;Bowtell R
通讯作者：
Bowtell R
影响因子：
9.8
作者：
Brantley, Justin A.;Trieu Phat Luu;Contreras-Vidal, Jose L.
通讯作者：
Contreras-Vidal, Jose L.
DOI：
10.1073/pnas.1702493114
发表时间：
2017-12-12
影响因子：
11.1
作者：
Leong V;Byrne E;Clackson K;Georgieva S;Lam S;Wass S
通讯作者：
Wass S
影响因子：
44.1
作者：
HAMALAINEN, M;HARI, R;LOUNASMAA, OV
通讯作者：
LOUNASMAA, OV