Journal of Biomedical Engineering Research (대한의용생체공학회:의공학회지)

The Korean Society of Medical and Biological Engineering (대한의용생체공학회)
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Development of a Hybrid fNIRS-EEG System for a Portable Sleep Pattern Monitoring Device

휴대용 수면 패턴 모니터링을 위한 복합 fNIRS-EEG 시스템 개발

  • Gyoung-Hahn Kim (Technical Research Institute, Hyundai E.D.S.) ;
  • Seong-Woo Woo (Technical Research Institute, Hyundai E.D.S.) ;
  • Sung Hun Ha (Technical Research Institute, Hyundai E.D.S.) ;
  • Jinlong Piao (Technical Research Institute, Hyundai E.D.S.) ;
  • MD Sahin Sarker (Technical Research Institute, Hyundai E.D.S.) ;
  • Baejeong Park (Technical Research Institute, Hyundai E.D.S.) ;
  • Chang-Sei Kim (Department of Mechanical Engineering, Chonnam National University)
  • Received : 2023.10.04
  • Accepted : 2023.11.14
  • Published : 2023.12.31
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Abstract

This study presents a new hybrid fNIRS-EEG system to meet the demand for a lightweight and low-cost sleep pattern monitoring device. For multiple-channel configuration, a six-channel electroencephalogram (EEG) and a functional near-infrared spectroscopy (fNIRS) system with eight photodiodes (PD) and four dual-wavelength LEDs are designed. To enhance the convenience of signal measurement, the device is miniaturized into a patch-like form, enabling simultaneous measurement on the forehead. Due to its fully integrated functionality, the developed system is advantageous for performing sleep stage classification with high-temporal and spatial resolution data. This can be realized by utilizing a two-dimensional (2D) brain activation map based on the concentration changes in oxyhemoglobin and deoxyhemoglobin during sleep stage transitions. For the system verification, the phantom model with known optical properties was tested at first, and then the sleep experiment for a human subject was conducted. The experimental results show that the developed system qualifies as a portable hybrid fNIRS-EEG sleep pattern monitoring device.

Keywords

Acknowledgement

본 과제(결과물)는 2023년도 교육부의 재원으로 한국연구재단의 지원을 받아 수행된 지자체-대학 협력기반 지역혁신 사업의 결과입니다(과제관리번호: 2021RIS-002).

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