A Portable and a Scalable Multi-Channel Wireless Recording System for Wearable Electromyometrial Imaging.
A Portable and a Scalable Multi-Channel Wireless Recording System for Wearable Electromyometrial Imaging.
复制标题
用于可穿戴肌电成像的便携式且可扩展的多通道无线记录系统。
DOI：
10.1109/tbcas.2023.3278104
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发表时间：
2023
影响因子：
5.1
通讯作者：
Chakrabartty,Shantanu
中科院分区：
文献类型：
--
作者：
Li,Weilun;Xiao,Zhili;Zhao,Junyi;Aono,Kenji;Pizzella,Stephanie;Wen,Zichao;Wang,Yong;Wang,Chuan;Chakrabartty,Shantanu
子宫肌电成像（EMMI）技术已成为一种有前途的技术，可用于非侵入性妊娠风险分层和预防早产并发症。目前的EMMI系统体积庞大，需要与台式仪器进行拴系连接，因此，该系统无法在非临床和门诊环境中使用。在这篇文章中，我们提出了一种设计可扩展的便携式无线EMMI记录系统，可用于家庭和远程监控的方法。可穿戴系统使用非平衡差分电极复用方法来增强信号采集带宽，并减少由于电极漂移、放大器1/f噪声和生物电位放大器饱和而引起的伪影。有源屏蔽、无源滤波器网络和高端仪表放大器的组合确保了足够的输入动态范围（），使得系统除了采集EMMI肌电图（EMG）信号外，还可以同时采集不同的生物电位信号，如母体心电图（ECG）。我们表明，开关文物和通道串扰引入由于非平衡采样可以减少使用补偿技术。这使得系统能够潜在地扩展到大量通道，而不会显著增加系统功耗。我们证明了所提出的方法的可行性，在临床环境中使用8通道电池供电的原型，每通道的信号带宽为1 KHz，功耗小于8 W。
Electromyometrial imaging (EMMI) technology has emerged as one of the promising technology that can be used for non-invasive pregnancy risk stratification and for preventing complications due to pre-term birth. Current EMMI systems are bulky and require a tethered connection to desktop instrumentation, as a result, the system cannot be used in non-clinical and ambulatory settings. In this article, we propose an approach for designing a scalable, portable wireless EMMI recording system that can be used for in-home and remote monitoring. The wearable system uses a non-equilibrium differential electrode multiplexing approach to enhance signal acquisition bandwidth and to reduce the artifacts due to electrode drifts, amplifier 1/f noise, and bio-potential amplifier saturation. A combination of active shielding, a passive filter network, and a high-end instrumentation amplifier ensures sufficient input dynamic range () such that the system can simultaneously acquire different bio-potential signals like maternal electrocardiogram (ECG) in addition to the EMMI electromyogram (EMG) signals. We show that the switching artifacts and the channel cross-talk introduced due to non-equilibrium sampling can be reduced using a compensation technique. This enables the system to be potentially scaled to a large number of channels without significantly increasing the system power dissipation. We demonstrate the feasibility of the proposed approach in a clinical setting using an 8-channel battery-powered prototype which dissipates less than 8W per channel for a signal bandwidth of 1 KHz.