fNIR Systems extract measurements from an LED light source at wavelengths of 730 nm and 850 nm, and also provide a unique feature that can be useful for identifying certain types of noise within recordings. This feature enables the fNIR imager to record measurements under “dark current” conditions.
Dark current measurements are always recorded in fNIR data output files (.nir and .oxy) and can be monitored during sensor placement, baseline, and overall testing measurement periods by selecting **** under **** buttons in COBI studio.
Time periods during which dark current measurements do not remain flat in close correlation with measurements taken at 730 nm and 850 nm can help identify noisy data segments. These regions can subsequently be marked and discarded from further hemoglobin content extraction analysis.
Noise is not always as obvious the sample shown, and dark current measurements offer a justifiable secondary measure for verifying the presence of noise in all cases.
fNIRS Imaging Systems are stand-alone functional brain imaging solutions for continuous NIR spectroscopy (NIRS). They provide an in-lab cognitive function assessment and eliminate a great many of the drawbacks of a functional MRI. fNIRS optical imaging technology measures neural activity and hemodynamic response in the prefrontal cortex. Subjects wear an fNIR sensor (IR light sources […]
BIOPAC provides software and hardware that allows research teams to study large group interactions. Here are a few notable studies using BIOPAC equipment for large group research focusing on participation and EDA data. Participation is Key Active participation in education is always thought to lead to better results. Using two groups of six students, TA’s led labs using […]
BIOPAC’s comprehensive Introductory ECG Guide addresses fundamental to advanced concerns to optimize electrocardiography data recording and analysis. Topics include: ECG Complex; Electrical and Mechanical Sequence of a Heartbeat; Systole and Diastole; Configurations for Lead I, Lead II, Lead III, 6-lead ECG, 12-lead ECG, precordial leads; Ventricular Late Potentials (VLPs); ECG Measurement Tools; Automated Analysis Routines for extracting, […]