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.
The NICO Smart Amplifier is specifically designed to measure thoracic impedance for performing noninvasive cardiac output measurements. The amplifier terminates in two connectors for impedance (Z) and its derivative (dZ), and has a 3 m cable that connects directly to an AMI100D Amplifier Input Module. Use with EL500 series disposable electrodes and LEAD131 for a four-spot […]
NIRS and CNAP—Pairing great tools for great data Cerebral hemoglobin concentration (blood mass in the brain) is frequently measured in the prefrontal cortex, and systemic arterial blood pressure is known to be a variable factor based on the hemoglobin concentration. A leg pressure cuff was used to constrict and release blood flow to create a […]
BIOPAC’s just released 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 […]