Journal Article

Evolution of MEG: A first MEG‐feasible fluxgate magnetometer

Ossadtchi, Alexei, Koshev, Nikolay, Skidchenko, Ekaterina, Kuzmichev, Alexey, Vetoshko, Petr, Fedorov, Maxim, Butorina, Anna, Ostras, Maxim

2021

Overview

In the current article, we present the first solid‐state sensor feasible for magnetoencephalography (MEG) that works at room temperature. The sensor is a fluxgate magnetometer based on yttrium‐iron garnet films (YIGM). In this feasibility study, we prove the concept of usage of the YIGM in terms of MEG by registering a simple brain induced field—the human alpha rhythm. All the experiments and results are validated with usage of another kind of high‐sensitive magnetometers—optically pumped magnetometer, which currently appears to be well‐established in terms of MEG. In the current article, we present the first solid‐state sensor feasible for magnetoencephalography (MEG) that works at room temperature. The sensor is a fluxgate magnetometer based on yttrium‐iron garnet films (YIGM). In this feasibility study, we prove the concept of using the YIGM in terms of MEG by registering a simple brain‐induced field—the human alpha rhythm. All the experiments and results are validated with the usage of another kind of high‐sensitive magnetometers—optically pumped magnetometer, which currently appears to be well‐established in terms of MEG.

• Publisher: John Wiley & Sons, Inc
• Subject: alpha rhythm / Cooling / Feasibility studies / Fluxgate magnetometers / Laboratories / Magnetic fields / Magnetoencephalography / Magnetometers / Medical imaging / Nitrogen / optically pumped magnetometers / Registration / Room temperature / Sensors / Yttrium / yttrium‐iron garnet magnetometers