Magnetoencephalography

Magnetoencephalography (MEG) provides non-invasive, high-resolution recordings of brain activity. The most commonly used technology to perform MEG is based on Superconducting Quantum Interference Devices (SQUIDs), which are extremely sensitive magnetometers, but they require cryogenic cooling and are therefore quite bulky.

Optically Pumped Magnetometers (OPMs) are a newer, promising quantum technology to perform MEGs. OPMs are small, lightweight, and don't need cryogenic cooling, allowing wearable MEG systems that can be placed closer to the scalp.

With wearable MEG systems, subjects can move naturally during recording, enabling new experiments. The close proximity to the scalp increases spatial resolution. OPM based systems can be significantly cheaper than SQUID based system, making the technology more accessible to help in preventing brain related diseases.