Spinoff of CEA-Leti Grenoble
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Taking full advantage of room temperature quantum sensor technology to enhance and democratise the use of MEG. This state-of-the-art technology, for >10yrs use in Space applications, aims to be part of the development of new clinical applications for MEG.
Room Temperature operation. No heating nor cooling.
Large Bandwidth (DC – 2000Hz). Detection of whole brain dynamics.
High dynamic range (up to 200 nT).
Noise <40 fT/Hz1/2 on 2 of the 3 axis.
High-accuracy
Measure along the 3 axes with continuous
self-compensation.
Wearable helmet, Automatic localisation of sensors.
Designed with a modular approach for seamless scalability: the tri-axial Helium gas sensor upscale the channels of recordings from 48 up to 288.
Distance matters: by measuring closer to the scalp (1-3 mm), our OPM-MEG system can achieve higher sensitivity and spatial precision than conventional MEG systems that measure at approximately 2 cm distance.
The helmet can adapt to any head shape or size.
With a large frequency bandwidth, up to 2000Hz, our sensors capture a wider range of brain dynamics, including epileptic activity such as High Frequency Oscillations (HFOs), fast ripple.
Real-time view and data recording.
Auto-localisation – sensor position monitoring
We designed and implemented a novel method taking advantage of the 3 axes measurement and 3D coils of our sensor. The localisation on the subject’s head will be performed thanks to referent coils placed at specific locations around the head.
Ensures a universal data output format (FIFF) and operates on a Linux-based software platform, enhancing compatibility with open-source platforms and licensed software.
| Bandwidth (Hz) | DC-2000Hz | Allow the recording of a wider range of brain dynamics, including epileptic activity such as HFOs and fast ripple. |
| Dynamic Range (nT) | Up to 200nT | Resulting in reduced requirements in magnetic shielding and improvements in susceptibility to background magnetic noise (reduced sensor saturation or movement-related noise), with no requirement for additional field-nulling coils. |
| Sensor Noise (fT/rtHz) | <40fT/rtHz | Lower sensitivity is compensated by the fact that sensors are in direct contact with the scalp, resulting in higher signal acquisition as a consequence of the absence of thermal insulation required with other OPM systems. |
| Power Dissipation (W, for approx. 50 sensor array) | 1W | Sensors operate at room temperature: they can be directly positioned and placed on the subject’s scalp (significant improvements in signal-to-noise ratio), allow for long-time recordings and, don’t show any lifespan issues (no thermal heating). |
| Accuracy | Closed Loop on the 3 axis | • No drift of sensors.
• Reduced inconsistency within the network giving a more accurate reconstruction of brain current (activity). • No Cross Axis Projection Error (CAPE). • Improved stability to magnetic disturbances. |
| Sensor Localisation | Helmet fixation with Auto Localisation | Proprietary anti-localising scanning method for each sensor with respect to other sensors and to a head reference frame. |
| Sensor Dimension (mm) | 19 x 19 x 50mm | Allowing for the placement of 96 (adult) and 85 (child) sensors within the helmet. |
| Reliability (Lifespan) | ~10 years | Technology has been developed for use in Space applications. |
If you are interested in learning more about the future development of OPM-MEG system and, if would like to join us on this adventure let’s start a conversation!
Spinoff of CEA-Leti Grenoble