UCL Wearable Near Infrared Brain Imaging System in the UK

1、 Product Overview

the United KingdomUCLUniversity Biomedical Optics Research Laboratory（BORL）The latest research and development has been carried outDEVICEHigh density wearable near-infrared brain imaging system.DEVICEThe system has the characteristics of light weight and wearability, does not require fiber optics, and can be applied to any age and various real natural environments; Hexagonal sensors can be flexibly adjusted and upgraded between different combinations of hats and channels, allowing for multi distance light sources across sensors-The detector forms a measurement channel, improves data quality, provides continuous, uniform high-density coverage to the brain, and forms high-densityfNIRSOr diffuse optical tomography imaging(DOT)Array.

DEVICEThe system configuration includes36A light source,48A detector(optional18A light source,24A detector)Can simultaneously obtain up to42-1728Data from each channel; Diffusion Optical Tomography Technology（DOT）Being able to approachfMRIThe spatial resolution of functional magnetic resonance imaging displays changes in hemoglobin concentration.

Functional near-infrared spectroscopy imaging technology(fNIRS)Use light to monitor human brain function. This technology transmits near-infrared light to the scalp and then detects the scattered light on the scalp from a few centimeters away, measuring changes in the concentration of oxygenated and deoxygenated hemoglobin in the brain. Due to the close relationship between brain activity and local blood flow, these changes in hemoglobin concentration provide a reliable measure of brain function.

Compared with other brain functional imaging techniques, near-infrared brain functional imaging technology has the advantages of good spatial resolution, high sampling rate, more measurement indicators, good comfort, and low cost, and has a wide range of applications in cognitive neuroscience and clinical research; Meanwhile, due to its strong resistance to motion interference and portability, the value of the system in fields such as sports science and brain computer interfaces has gradually been recognized by researchers. Specific application cases include research on cognitive load of drivers, multimodal brain computer interface research, and emotional state research of operators.

2、 Product Features

The core advantage of LUMO system: high-density sampling formed by tile sensor design.

• Expanded the range of measured brain regionsThe design of tile sensors allows for data collection between sensors, making the sampling area more dense and uniform, greatly increasing the measurement range of the brain and avoiding the possibility of missing a certain cerebral cortex;

• More reliable brain function dataResearch has shown that high-density sampling can obtain more reliable brain function data results compared to traditional fNIRS sampling methods. The measurement method with only a fixed spacing (30mm) is highly susceptible to signal contamination from the scalp; LUMO provides multiple short distance channels for each light source and detector, which can be used to detect, separate, and remove interference from scalp signals. Only by using high-density sampling can users truly determine that the collected data comes from the brain;

• Flexible configurationLUMO's groundbreaking modular design allows researchers to switch between different hat and array configurations at any time, saving valuable experimental time;

• Scalable designThe LUMO system is modular, which means users can start with a small number of sensors and build their own LUMO system within budget constraints.

By combining tile sensors with specially designed LUMOCAP caps, users can quickly create high-density fNIRS arrays, achieving 3D brain functional imaging comparable to fMRI resolution.

3、 Functional application

●1ThefNIRS HyperscanningBrain function super scanning system:DEVICEprovidedfNIRS HyperscanningBrain function ultra scanning solution,LUMO fNIRSThe modular design of the hyper scanning system can provide2Real time synchronization of brain function ultra scan testing for individuals and above, with support for data synchronization.DEVICEThe brain function super scanning system supports both wired and wireless operation modes, which can be reached by a single person48-1728Channel. Ergonomic hexagonal sensor design that allows for multi distance light sources across sensors-Detector forms measurement channel(10-50mm)It provides continuous and uniform brain coverage, and the average cortical sensitivity provided by the system is traditionalfNIRSof100Twice.LUMO fNIRSThe brain function ultra scanning system is easy to operate, not limited by space, and not affected by eye movement activities, so it is often used for data collection in environments with high ecological validity.fNIRSHyperscan technology provides better thanfMRIHyperscan technology provides a more realistic experimental environment, compared toEEGThe better spatial accuracy of superscan technology is becoming an important research tool in cognitive and behavioral studies.

●2TheEEG-fNIRSMultimodal brain function testing system:UCLHigh density near-infrared brain functional imaging system can work withNeurOneWhen used in conjunction with a high-precision EEG measurement systemEEGandfNIRSIntegrate and leverage the advantages of both,EEGThe time resolution is high, but the spatial resolution is low;fNIRSThe time resolution is low and the real-time performance is poor, but the spatial resolution is high. To accurately, comprehensively, and in real-time measure the activity of the brain in cognitive processes, achieving comprehensive and real-time brain imaging is undoubtedly a better strategy. combineEEGandfNIRSThe multimodal brain imaging technology has great application prospects in cognitive neuroscience research, and can also be used to build multimodal brains-Machine interface system.

4、 System composition

DEVICEThe system mainly consists of three parts:LumotileTile sensorsLUMOCAPhat andLumohubIntegrated device.

●LumotileTile sensor:DEVICEThe core component of the system is a hexagonal tile shaped sensor. Each sensor contains three near-infrared light sources and four detectors. Data measurement can be performed inside and between tile sensors; Use twoDEVICETile sensors can generate up to48afNIRSChannel; Equipped with anti light tube design; High quality optical filters that maximize the suppression of ambient light interference; The distance between the internal light source and detector of the tile sensor is10mmand20mmThe distance between the light source and detector between the tile sensors is50mmIn line with ergonomic characteristics, the hat connection is simple and fast; can be paired with3DCoordinated use of positioning system; Weight less than6g.

●LUMOCAPHats: Hats of different sizes made of chloroprene rubber, each hat containing a set of bases into which tile sensors can be inserted. Multiple bases are combined together using a printed circuit board, allowing the hat to stretch and adapt to various head shapes; The light guide tube in contact with the scalp is detachable and suitable for various hair types and populations.

●LumohubIntegrate: Can run in wired or wireless mode, using cables to connect the hat to the device in wired modeHUBConnect the integrator and thenHUBThe integrator passes throughUSBConnect the cable to the laptop. eachHUBThe integrator can connect up to three simultaneouslyLUMOCAPIn order to synchronize the collection.LUMOHUB AIRThe wireless integrator can be worn on the upper arm or tucked into a pocket, suitable for wireless neuroimaging applications, including sports, natural environment, and related research in the daily environment of infants.

5、 Technical specifications