Wireless optically pumped magnetometer MEG

The current magnetoencephalography (MEG) systems, which rely on cables for control and signal transmission, do not fully realize the potential of wearable optically pumped magnetometers (OPM). This study presents a significant advancement in wireless OPM-MEG by reducing magnetization in the electronics and developing a tailored wireless communication protocol. Our protocol effectively eliminates electromagnetic interference, particularly in the critical frequency bands of MEG signals, and accurately synchronizes the acquisition and stimulation channels with the host computer's clock. We have successfully achieved single-channel wireless OPM-MEG measurement and demonstrated its reliability by replicating three well-established experiments: The alpha rhythm, auditory evoked field, and steady-state visual evoked field in the human brain. Our prototype wireless OPM-MEG system not only streamlines the measurement process but also represents a major step forward in the development of wearable OPM-MEG applications in both neuroscience and clinical research.

Authors

• Hao Cheng Hebei University of Technology
• Kaiyan He
• Congcong Li
• Xiao Ma AI Lab, Lenovo Research
• Fufu Zheng
• Wei Xu Georgia Institute of Technology
• Pan Liao
• Rui Yang
• Dongxu Li
• Lang Qin Zhejiang University
• Shuai Na
• Bingjiang Lyu
• Jia-Hong Gao

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