Optimising the sensing volume of OPM sensors for MEG source reconstruction.

Optimising the sensing volume of OPM sensors for MEG source reconstruction.
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面向MEG源重构的OPM传感器传感体积优化。

DOI:
10.1016/j.neuroimage.2022.119747
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发表时间:
2022-12-01
期刊:
影响因子:
5.7
通讯作者:
Kowalczyk AU
Kowalczyk AU
中科院分区:
医学1区
文献类型:
--
作者:
Bezsudnova Y;Koponen LM;Barontini G;Jensen O;Kowalczyk AU

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基于光泵磁力计的脑磁图(MEG)被誉为未来的脑电生理记录。在这项工作中,我们研究了传感体积(蒸汽电池)的尺寸如何影响单个OPM-MEG传感器和多传感器OPM-MEG系统的性能。我们考虑一个现实的噪声模型,占背景的大脑活动和残余噪声。通过使用源重建指标,如定位精度和时程重建精度,我们证明了最好的整体灵敏度和重建精度实现与细胞显着更长,更宽的那些大多数当前的商业OPM传感器。我们的工作提供了有用的工具,以优化在广泛的环境中的OPM传感器的单元尺寸。
Magnetoencephalography (MEG) based on optically pumped magnetometers (OPMs) has been hailed as the future of electrophysiological recordings from the human brain. In this work, we investigate how the dimensions of the sensing volume (the vapour cell) affect the performance of both a single OPM-MEG sensor and a multi-sensor OPM-MEG system. We consider a realistic noise model that accounts for background brain activity and residual noise. By using source reconstruction metrics such as localization accuracy and time-course reconstruction accuracy, we demonstrate that the best overall sensitivity and reconstruction accuracy are achieved with cells that are significantly longer and wider that those of the majority of current commercial OPM sensors. Our work provides useful tools to optimise the cell dimensions of OPM sensors in a wide range of environments.
DOI: 10.1038/srep29638
发表时间: 2016-07-15
期刊: Scientific reports
影响因子: 4.6
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