EEG Systems

EXG and Biometric Solutions

DSI-Hybrid-EEG+fNIR

  • DSI-Hybrid-EEG+fNIR

    The DSI-Hybrid EEG + fNIR headset is a complete, research-grade, combined wireless EEG and fNIR system designed for synchronized recording of the brain’s electrical activity and its hemodynamic response or blood-oxygen-level dependent (BOLD) response. The EEG and fNIR sensors are arranged to allow simultaneous and superimposed recordings at locations distributed on the scalp.

    • ㆍActive dry electrode EEG sensor with 2 stage amplification and digitization in
          headset delivers research-grade EEG signal (>90% correlation with
          conventional wet electrode systems)
    • ㆍTriple frequency ultra-bright LED emitters and amplified detectors offer
          reliable through hair fNIR
    • ㆍfNIR optodes arranged around dry electrode EEG sensors for co-registered
          measurement of EEG and BOLD
    • ㆍPatented artifact resistant electro-mechanical designs enable ambulation in
          naturalistic environments
    • ㆍShort- and Long- light paths fNIR measurements empower integrated
           algorithms for regression of Mayer wave artifact

Practical EEG and fNIR

  • ㆍFully integrated and synchronized, complete EEG and fNIR system in a single device
  • ㆍIdeal for combined hemodynamic and electrophysiological research
  • ㆍAutodetection of optimal emitters and detectors to use for each fNIR location
  • ㆍRaw fNIR signals converted to changes in concentration of oxygenated and deoygenated hemoglobin (BOLD)
  • ㆍRapid set-up and clean-up time
  • ㆍAdjustable to fit a wide range of head sizes (52-62 cm)

Powerful Options

  • ㆍ8 channel locations with combined EEG and fNIR for concomittant measurement of EEG and fNIR
  • ㆍProvides excellent temporal precision from EEG combined with spatial precision from fNIR.
  • ㆍWireless triggering for synchronization of multiple devices (hyper-scanning) and ambulatory ERPs
  • ㆍBluetooth or wired-USB transmission
  • ㆍAdjustable power settings for each emitter LED wavelength

Applications

The DSI-Hybrid-EEG+fNIR’s practicality, portability, and high signal quality opens the door to taking numerous applications that were previously limited to lab environments to more naturalistic settings. Such applications include:

  • ㆍNeuroscience research
  • ㆍNeuroscience research
  • ㆍNeurovascular Coupling
  • ㆍNeurofeedback
  • ㆍNeuromarketing
  • ㆍBiomarkers

Synchronized Interfaces

  • ㆍEye-tracking
  • ㆍMotion capture
  • ㆍNeuroGuide / BrainSurfer
  • ㆍEEGLAB / ERPLAB /BCILAB
  • ㆍMensia Neuro RT / OpenVibe
  • ㆍTEA Ergo CAPTIV
  • ㆍBCI2000
  • ㆍE-Prime
  • ㆍInquisit
  • ㆍPresentation

Intuitive Software Included

  • ㆍDSI-Streamer
  •    ㆍSignal quality metrics
  •    ㆍMontages
  •    ㆍERPs
  •    ㆍFile formats: EDF, CSV (filtered and raw)
  •    ㆍStreaming via TCP/IP socket
  • ㆍC-based API for Windows/Mac/Linux
  • ㆍLSL streaming

fNIR emitters and detectors 4 pairs per sensor
Emitter Frequencies 760, 808, 850 nm
fNIR Sampling Rate 15 Hz
fNIR Bandwidth 40 nm

Sensor Locations 8 sensors at 10-20 locations: Fp1, Fp2, C3, C4, T7/T3, T8/T4, , O1, O2, A1, A2
Common-Mode-Follower Pz is default reference (can be changed to LE in software)
Ground Fpz
Amplifier/Digitizer 16 bits, 8 channels
Analog/Digital Resolution 0.317 uV referred to input
Analog/Digital Converter 16 bits
Sample 300 Hz
Bandwidth 0.003-150 Hz
Gain 60
Common Mode Rejection Ratio >120 dB
Channel Cross-Talk < -70 dB with sensors
Input Impedance (1Hz) 47 Gohm
Input Bias Current <25 pA
DC Offset Tolerance +/-200 mV
Maximum Input Range 10mV pk-pk
Noise (1-50Hz) <1 uV peak-peak
Digital Inputs 8-bit input
Run-time 4h
Wireless Bluetooth
Wireless Range 10 m
Headset weight ~513 g
Headsize Fit 52-62 cm circumference
Notice * Specifications subject to change, please contact us to obtain latest specifications