Event Abstract Back to Event MEG software shielding with multilayer sensor arrays and vector sensors Jussi Nurminen1*, Samu Taulu2 and Yoshio Okada3 1 , Hospital District of Helsinki and Uusimaa, BioMag Laboratory, HUSLAB, Finland 2 Elekta Oy, Finland 3 University of New Mexico, Dept. Neurology and BRaIN Center, United States Among other applications, the signal space separation (SSS) method enables efficient shielding against external interference by separating magnetic field components internal and external to the MEG sensor array. The performance of SSS depends on the geometry of the sensor array. The sensors of biomagnetic instruments are typically radially oriented and located on a single, approximately spherical surface. There are results indicating that this traditional geometry limits the performance of SSS by impeding the separation of internal and external signal components. Conversely, using two sensor layers is expected to improve SSS performance by providing information on the radial dependency of the magnetic field. Multiple field components can also be measured for a further improvement in performance. Motivated by these considerations, we evaluated the software shielding performance of several novel sensor array geometries by computer simulation. The results show that using two sensor layers can provide a software shielding factor of about 1000, which is several times higher than the value achieved with existing state-of-the-art MEG instruments. The noise characteristics of the SSS reconstruction are also significantly improved. The novel sensor array geometries would be useful in applications where the highest possible shielding performance is needed. Conference: Biomag 2010 - 17th International Conference on Biomagnetism , Dubrovnik, Croatia, 28 Mar - 1 Apr, 2010. Presentation Type: Poster Presentation Topic: Instrumentation and Multi-modal Integrations: MEG, Low-field MRI,EEG, fMRI,TMS,NIRS Citation: Nurminen J, Taulu S and Okada Y (2010). MEG software shielding with multilayer sensor arrays and vector sensors. Front. Neurosci. Conference Abstract: Biomag 2010 - 17th International Conference on Biomagnetism . doi: 10.3389/conf.fnins.2010.06.00042 Copyright: The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers. They are made available through the Frontiers publishing platform as a service to conference organizers and presenters. The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated. Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed. For Frontiers’ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions. Received: 19 Mar 2010; Published Online: 19 Mar 2010. * Correspondence: Jussi Nurminen, , Hospital District of Helsinki and Uusimaa, BioMag Laboratory, HUSLAB, Helsinki, Finland, jnu@iki.fi Login Required This action requires you to be registered with Frontiers and logged in. To register or login click here. Abstract Info Abstract The Authors in Frontiers Jussi Nurminen Samu Taulu Yoshio Okada Google Jussi Nurminen Samu Taulu Yoshio Okada Google Scholar Jussi Nurminen Samu Taulu Yoshio Okada PubMed Jussi Nurminen Samu Taulu Yoshio Okada Related Article in Frontiers Google Scholar PubMed Abstract Close Back to top Javascript is disabled. Please enable Javascript in your browser settings in order to see all the content on this page.