Quantum Sensing in Medicine: Wearable Brain Scanners

Updated 2026-10-11 | 4 min read | QUANTUM (QNT) community

Listening to the brain's magnetism

Every thought involves tiny electrical currents in brain cells, and currents make magnetic fields. Magnetoencephalography (MEG) measures them. These fields are astonishingly faint, far weaker than Earth's own field, so the sensors must be extraordinary. This is a natural job for quantum sensing.

The old way and the new way

Conventional MEG uses superconducting sensors that must be cooled to about minus 269 degrees Celsius, according to the University of Nottingham. That makes scanners large and expensive, and the sensors sit in a fixed helmet that fits one head size, so the patient must stay still and the sensors sit further from the scalp.

The new approach uses optically pumped magnetometers (OPMs), small atomic sensors described in magnetometers, gravimeters and NV diamonds. They need no cryogenics and are small enough to mount in a lightweight helmet, so they can sit closer to the scalp, which improves signal quality. The same system can be used on adults and babies, and Nottingham reported millimetre-level accuracy even when subjects move.

From university lab to company

Cerca Magnetics was announced on 7 December 2020 as a spin-out from the University of Nottingham and Magnetic Shields Limited, to commercialize the wearable scanner. The research was supported by the UK Quantum Technologies Programme, Innovate UK, Wellcome and EPSRC. At launch, CEO David Woolger said the company hoped and believed that within three to five years the technology would become commonplace in hospitals. That was a hope from 2020, not a confirmed outcome, and I could not confirm current clinical clearance or installation counts, so check Cerca's own site.

Reporting on OPM-MEG systems has cited a price range of roughly 375 thousand to 1.5 million pounds depending on the configuration, described as lower than conventional MEG. The range comes from a University of Nottingham impact case study (conventional MEG is described there as costing over 2 million pounds), not from a Cerca quote, so ask Cerca for current pricing.

Why shielding is part of the product

Brain signals are much smaller than the magnetic noise from lifts, cars and the Earth. OPMs also work best near zero background field. So the system includes special magnetic shielding, which is why a shielding company is a founding partner. This is a good example of how a sensor becomes a product: the quantum part is only one piece of the engineering.

What the UK government has said

Government quantum missions in the UK include a goal that every NHS Trust benefits from quantum sensing enabled solutions by 2030, aimed at early diagnosis, according to reporting. A 2024 procurement notice sought a roadmap for quantum sensing in healthcare, with priorities including brain imaging for neurological conditions such as dementia, cancer imaging, quantum enhanced MRI and diagnostic tests. Funding awards reported include 1,488,588 pounds to Cerca Magnetics for a roadmap to clinical adoption of quantum-enabled brain imaging. Goals are not guarantees, and the delivery timeline is what to watch.

What it could help with

• Epilepsy and brain disorders, where locating abnormal activity matters.
• Children, who struggle to lie still in a rigid scanner.
• Research on how brains develop, thanks to freedom of movement.

I am describing the potential reported by the developers. Clinical evidence and regulatory approval, not hype, will decide how widely it spreads.

Other medical quantum sensing ideas

NV diamonds can detect magnetic signals at the scale of cells and molecules in research settings, and quantum enhanced MRI and diagnostic tests are on the UK priority list. These are earlier than wearable MEG. If you want the computing side of healthcare, read quantum computing in medicine and materials, which covers a very different, longer-term path.

The upbeat takeaway

Wearable brain scanning shows what the best quantum products look like: they do an existing job better, they remove a painful constraint (the freezing cold, the rigid helmet) and they come from careful engineering with doctors. It is one reason sensing may reach people first. This is educational only. It is not medical or financial advice, and it has no connection with any memecoin.

Sources and further reading

• REF 2021 impact case study: OPM-MEG (Nottingham)
• University of Nottingham: Cerca Magnetics spin-out
• Magnetics Magazine: OPMs for drones and brain imaging
• Electronic Specifier: UK quantum missions
• UK Find a Tender: quantum sensing in healthcare roadmap notice

Reported as of 2026-10-09. Many test results below are company reported and not independently confirmed. Check primary documents before relying on any figure. This site is educational and is not financial advice. The QNT memecoin is independent and is not linked to Quantinuum Ltd or any company, lab or government named here.

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