Cortivision PHOTON CAP C20

Lightweight fNIRS device that measures time-resolved changes of brain oxygenation through optodes positioned on the scalp

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Patient wearing a mesh cap with different nodes sitting in an office as a researcher uses a motion mapping tool that looks like a pen

Description

Functional near-infrared spectroscopy (fNIRS) is a non-invasive neuroimaging technique that is mobile and does not require the use of disposable accessories such as gels, conductive liquids or disposable electrodes. This makes fNIRS an ideal tool for research in neuroscience, psychology, education and sports.

The PHOTON CAP C20 is comprised of an elastic cap with 16 small infrared light sources (LEDs) that emit near-infrared light towards the surface of the brain. The system is further equipped with 10 highly sensitive silicon photodiode detectors to measure near-infrared light. 

By detecting how much light at two distinct wavelengths is absorbed, fNIRS can measure changes in oxygenated and deoxygenated blood, giving insights into neural activity and cognitive functions. 

The amplifier module (worn on the upper arm for mobile applications) is connected to the NIR light emitters and detectors via a cable bundle. It sends the processed signal via wireless communication to the recording software on a nearby laptop.  

fNIRS can be used in conjunction with a Polhemus 3D Digitizer or Structure Sensore 3 3D scanner for the 3D location of optode positions, allowing for precise mapping of brain activity. 

Specifications

Technology: Near infrared spectroscopy of solid light using the modified Beer-Lambert law.
Light sources: 16 LEDs with wavelengths of 760nm and 850nm.
Detectors: 10 SiPD detectors.
Sampling frequency: Up to 86Hz and fixed frequency available.
Connectivity: Wireless Bluetooth technology 
Battery: 6 hours 
Weight: 230g
Different cap sizes are available
Software licenses are available that provide “montages” (i.e. optode configurations on the caps) based on the experimental design and RINSW staff can assist in acquisition, preprocessing and postprocessing of data.  

Applications

  • Neuro Imaging
  • Functional Imaging
  • Paediatric Imaging
  • Lifetime Cohorts
  • Longitudinal Studies

Techniques

  • NIR spectroscopy
  • Blood-oxygenation imaging
  • Mobile Imaging
  • Multi-modal Imaging

Included accesories

Polhemus PATRIOT™

Used for spatial localisation of optode (fNIRS) or electrode (EEG) positions. This allows for co-registration with MR images.

Structure Sensor 3

Our iPad mounted Structure Sensor 3 allows to quickly and precisely 3D-capture of optode (fNIRS) or electrode (EEG) positions for visualisation or for co-registration with MR images.

Instrument location

Research Imaging NSW

Level 1, Building 3
Prince of Wales Hospital
Randwick, NSW 2031

Email: researchimaging@unsw.edu.au

Dr Hannes Almgren

Senior Research Scientist

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    Email

    h.almgren@unsw.edu.au

Parent facility

Research Imaging New South Wales (RINSW)

RINSW is UNSW’s human imaging research core facility. We are fully integrated in the clinical environment of the Prince of Wales Hospital. Our unique infrastructure, operational model and hospital location allow us to serve paediatric and adult populations (including patients) and thereby advance both clinical research and basic science relying on imaging outcomes.