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Jan Mathijs Schoffelen¹, Teresa Cheung^2,3,4, Svenja Knappe^2,5,6

¹Donders Centre for Cognitive Neuroimaging, Donders Institute for Brain, Cognition and Behaviour, Radboud University, Nijmegen, The Netherlands.

Imaging neuroscience (Cambridge, Mass.)

|August 13, 2025

概括

光学磁计 (OPM) 提供先进的磁脑摄影 (MEG),但最佳的传感器设计是关键. 模拟表明双轴OPM为当前技术提供了大脑信号检测和噪声抑制的良好平衡.

科学领域:

神经科学是一个神经科学.
生物物理学的生物物理.
生物医学工程生物医学工程

背景情况:

光学磁计 (OPM) 正在成为神经科学中磁大脑摄影 (MEG) 的转型技术.
目前的全头MEG系统使用OPM,传感器配置因测量方向和位置的数量而异.
优化OPM系统设计,包括传感器放置和定向,对于在实际约束下最大限度地提高数据质量至关重要.

研究的目的:

调查OPM对MEG的最佳空间分布和传感方向.
为了比较单轴,双轴和三轴OPM阵列的性能,使用一定的频道数量.
引导未来基于OPM的MEG系统的设计,以改善大脑活动测量和噪声抑制.

主要方法:

使用192通道OPM阵列进行了模拟研究,在不同位置使用单轴,双轴和三轴传感器.
从二极性大脑来源生成模拟的MEG信号,结合传感器,大脑和运动诱导的噪音.
对已清理的数据进行双极适配分析,以评估局部化误差和双极时刻幅度.

主要成果:

辐射感应方向在检测大脑活动方面通常优于接触式方向.
整合触角传感方向有助于抑制环境噪音.
当将三轴传感器与双轴传感器进行比较时,没有观察到显著的性能改善.

结论:

考虑到当前的技术限制,双轴OPM传感器似乎是对三轴传感器的首选选择,当通道数量固定时.
三轴传感可能会导致空间采样和每个通道的信号噪声比率减少.
这些发现为基于OPM的MEG系统的实际设计和实施提供了宝贵的见解.

关键词:

在MEG MEG中,我们可以使用MEG.在 OPM OPM 里面.磁脑脑摄影 (MEG) 是一种磁脑脑摄影技术.消除噪音的方法有光学的磁力计,具有光学的磁力计.传感器阵列是一系列的传感器阵列.软件屏蔽软件屏蔽软件屏蔽

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