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New wearable non-invasive optical brain imaging device

 Last Update: 2022-02-21
 Source: Internet
 Author: User

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photon light

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Kernel Flow helmet

Recent advances in brain imaging technology have facilitated precise, high-resolution observations of the brain and its functions
.

For example, functional near-infrared spectroscopy (fNIRS) is a widely used non-invasive imaging technique that utilizes near-infrared light (wavelength >700 nm) to determine the relative relative levels of hemoglobin in the brain through differences in the light absorption patterns of hemoglobin concentration

Most non-invasive brain scanning systems use continuous-wave near-infrared spectroscopy (fNIRS), in which tissue is exposed to continuous photon radiation
.

However, these systems cannot differentiate between scattered and absorbed photons

To overcome these challenges, researchers at neurotechnology company Kernel have developed a wearable helmet based on TD-fNIRS technology
.

Dubbed the "kernel flow", the device weighs 2.
05kg and consists of 52 modules spread over 4 boards on either side of the head

The module has two laser sources that can generate laser pulses less than 150 picoseconds wide
.

These photons are then reflected by a prism and combined in a source light pipe that directs the beam to the scalp

To demonstrate its performance, the Kernel Flow system was used to record brain signals from two participants performing a finger-tapping task
.

During the test, histograms of more than 2,000 channels were collected from the brain to measure changes in oxyhemoglobin and deoxyhemoglobin concentrations

This system matches the conventional TD-fNIRS system
.

Ryan Field, CTO of Kernel and corresponding author of the study, explained: "We demonstrated benchtop-like performance with our miniaturized device, featuring normalized tissue and optical phantoms of TD-fNIRS and human neuroscience results.

While the results are promising, Field acknowledges that more testing is needed because some hair and skin types absorb NIR light differently
.

"We are currently collecting data using Kernel Flow to demonstrate other human neuroscience applications

Kernel Flow encapsulates a large-scale TD-fNIRS system into a wearable form factor, providing a next-generation non-invasive optical brain imaging device
.

Systems like Kernel Flow will make neuroimaging more accessible, with broad benefits in health and science

"This is the world's first wearable full head coverage TD-fNIRS system, which maintains or improves the performance of existing benchtop systems and has the potential to achieve It's the task of making neurometrics mainstream
.
I'm really looking forward to what the brain hasn't revealed yet
.
"

Magazine

Journal of Biomedical Optics

DOI

10.
1117/1.
JBO.
27.
7.
074710

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