| Zugriffsnummer | 47553 |
| Dokumenttyp | Konferenzartikel in Zeitschrift |
| Peer Review | mit Peer Review |
| Sprache | Englisch |
| Titel | Avoiding non-linearity of optically pumped magnetometer MEG within an actively shielded two-layer mu-metal room |
| Autor(in); Institution |
Marhl, U.; University of Maribor, Maribor, SLOVENIA
Jazbinsek, V.; Institute of Mathematics, Physics and Mechanics, Ljubljana, SLOVENIA
|
| Quelle/Jahr | Current Directions in Biomedical Engineering: 7 (2021), 2, 543 - 546 |
| Availability | [online only] |
| ISSN | 2364-5504 (ONLINE) |
| DOI | |
| Verlag | Berlin: de Gruyter |
| Konferenzangaben | 55th Annual Conference of the German Society for Biomedical Engineering (VDE|DGBMT) (BMT 2021), Hannover, 5-7, October, 2021, Germany |
| Freie Schlagworte | Magnetoencephalography ; optically pumped magnetometer ; non-linearity ; movement artifact ; heartbeat artifact |
| Zusammenfassung | Some optically pumped magnetometer (OPM) sensors available for biomagnetic investigations have a linear range limited to +- 1 nT due to the specific properties of their open loop operation. In a two-layer magnetically shielded room of type Ak3b/Vacoshield Advanced with an external active compensation we studied how much sensor movement is allowed until amplitudes exceed the linearity range. Intentional movements were performed by a subject wearing an OPM-MEG sensor array. It was found that movements of 8 cm did yield non-linear amplitudes, but a reduction of the movement in half already preserves linearity. Despite movements, the heartbeat was found to generate a periodic signal, although the generating mechanism could not be identified so far. |
| Kostenfreier Zugang | Open Access Gold |
| Rechteinformation | CC BY 4.0 ; Creative Commons Attribution 4.0 License |
| Themenbereich der Metrologie | Metrologie in der Medizin |
Zitierung
Sander-Thömmes, T., Marhl, U., & Jazbinsek, V. (2021). Avoiding non-linearity of optically pumped magnetometer MEG within an actively shielded two-layer mu-metal room. Current Directions in Biomedical Engineering, 7(2), 543–546. https://doi.org/10.1515/cdbme-2021-2138