Brite MkIII

Plug-and-play wearable fNIRS with first-rate data quality

The Brite MkII cerebral fNIRS packages, associated accessories, and software. The Brite is a user-friendly, plug-and-play NIRS device with almost no set-up time. It works with multi-wavelengths LED’s, giving you continuous and real-time feedback in data collection and analysis software that is delivered with the system. It has a sampling rate of up to 150 Hz.

The soft neoprene head-cap and the portability of the system make monitoring the brain oxygenation status of elderly, children and vulnerable patients especially comfortable and easy. Hyperscanning (monitoring multiple subjects at the same time) is simple, as the software allows you to combine multiple Brites, or any other Artinis system, within one data stream.

As it is fully wearable, and weighs just 300 grams including the cap, subjects are even able to perform physical activities, like walking and running, while the device is connected wirelessly to the host computer. The Brite also has an integrated 9-axis movement sensor. This makes it the most suitable device for wearable fNIRS currently on the market, while providing the first rate data quality you need in a research-grade device.

Advantages

Advantages of the Brite MkII over Brite 24
- Multi-power gain control – allows the user to measure at 4 different power levels and auto-power settings, thus improving the recording of brain activity across a wide range of ages, skin color, hair type, cortical optode distance
- High-resolution data visualization and export
- Flexible optode template – enables users to select specific optode template (up to 54 channels with the possibility to enable more combination of channels upon request) in any cortical area of interest and according to their preferred layout
- Optimized ambient light correction– allows the use of Brite MKII in almost any environment, including outdoor, office, lab, and hospitals
  Improved OD dynamic range – increased system sensitivity allows to measure a wider range of OD ~ [0.01 up to 8.00]
- Lower noise – reduced system noise, enabling the user to acquire data with higher accuracy
- Flexible interoptode distances – No matter if you want to measure shallow or deep, any distance from 10 mm up to 55 mm is now possible

Specifications

TECHNOLOGY Continuous wave Near-InfraRed Spectroscopy (NIRS) using the modified Beer-Lambert law
RELATIVE MEASURES Oxy-, deoxy-, and total hemoglobin concentration changes
CHANNELS Up to 27, depending on optode template chosen
SHORT SEPARATION CHANNELS Short channels at 10 mm with multipower gain control
MULTIPOWER GAIN CONTROL Choose between 4 different power levels to improve your recordings or select the auto-power setting
INTER-OPTODE DISTANCE 10 to 55 mm
TRANSMITTERS 10 LEDs, each with 2 wavelengths
RECEIVERS 8 photodiodes
WAVELENGTHS Standard 760 and 850 nm, custom wavelength possible
AMBIENT LIGHT CORRECTION Proprietary algorithm to filter out ambient light
OPTODE HOLDERS 3 available heights to improve skin contact
DIMENSION Battery housing: 75x75x30 mm. Head caps available in multiple sizes: kids version (from 2 years old) and adults (XS - XL)
TOTAL WEIGHT Less than 300 grams including battery and head cap
ENVIRONMENT Operating temperature: 10 - 35 °C
INDICATORS Power, measuring, battery status, Bluetooth
POWER Up to 3 hours with with fast-charging battery, charging with power bank possible
SAMPLE RATE Up to 150 Hz
ORIENTATION SENSOR 6-axis motion sensor: 3x Accelerometer (x, y, z); 3x Gyroscope (x, y, z)
DATA COLLECTION & STORAGE Online, online 100+ hours, local back-up of data
DATA ANALYSIS SOFTWARE OxySoft, Optional: 3D extension
OPERATING SYSTEM Windows 10
EVENTS Online, offline or PortaSync
ELECTROMAGNETIC COMPATIBILITY No interference with TMS, EEG, EMG, ECG
HARDWARE SYNC OPTIONS PortaSync, parallel cable, serial cable, LabStreamer
SOFTWARE SYNC OPTIONS LSL, DCOM (e.g. Matlab, E-prime, Presentation)
NIRS + OTHER MODALITIES Available additional cost options: Brite + EEG package (32 channels and other options available) Brite + tES (STARSTIM)

Background

Optical oximetry and near-infrared spectroscopy (NIRS) in particular is a tool for non-invasively assessing the oxygenation status and hemodynamics of various organs, e.g., muscle and brain. They rely on mainly two characteristics of human tissue. Firstly, the relative transparency of tissue for light in the NIR range, and secondly on the oxygenation dependent light absorbance of hemoglobin. From the data collected using this technique, we can assess local brain activity.

Izzetoglu, Meltem & Bunce, Scott & Izzetoglu, Kurtulus & Onaral, Banu & Pourrezaei, Kambiz. (2007). Functional brain imaging using near-infrared technology. IEEE engineering in medicine and biology magazine : the quarterly magazine of the Engineering in Medicine & Biology Society. 26. 38-46. 10.1109/MEMB.2007.384094.

Based on the Brite 23/24, the Brite MkII is the most advanced wearable fNIRS system ever produced by Artinis Medical Systems, a company with 25 years in optical imaging, and forerunner in the world in portable fNIRS as measured by publications. It uses multi-wavelength LEDs as sources, and avalanche photodiodes as detectors, with power levels optimized by automatic multi-gain control. The base system attaches to the rear of the head cap, and the optodes interface with optode holders within the areas of the cap covering the cerebral cortex. The fact that the optodes and optode holders are separable allows hair to be dealt with easily, and three levels of depth adjustment allow a precise amount of tension to be applied to each sensor.

Components

The following components are included with Brite MkII packages:

Brite MkII base system, including control unit and optodes
Three head caps with choice of size, from 40 to 61 cm
Optode holders to equip one head cap
Travel-proof Pelican case, with precisely cut foam to cradle all components
14-15 inch host laptop with preinstalled data collection and analysis software
Software on USB drive
Software license key
Starter's kit
Bluetooth reciever

Optional add-ons to consider:

Additional optode holders to fully equip the three included caps (highly recommended)
PortaSync (highly recommended)
2x short channel package (2x replacement optode 1:4 and 8x optode holder)
Additional head-caps in various sizes and optode holders to equip the additional caps
Brite MkII 24-bit upgrade
Brite body mount
Brite frontal headband
Maintenance plan beyond the first year