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MAG4Health

Quantum-based technology OPM-MEG system

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.

Wearable helmet with a scalable number of sensors: from 16 up to 96 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.

MAG4Health OPM-MEG System

Capture the whole-head brain dynamics

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.

User-friendly acquisition software

Real-time view and data recording.


Sensor position monitoring

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.


MNE Python

Export Workflow

Ensures a universal data output format (FIFF) and operates on a Linux-based software platform, enhancing compatibility with open-source platforms and licensed software.

Technical specifications

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!


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