Cargando…

Quantitative Evaluation for Magnetoelectric Sensor Systems in Biomagnetic Diagnostics

Dedicated research is currently being conducted on novel thin film magnetoelectric (ME) sensor concepts for medical applications. These concepts enable a contactless magnetic signal acquisition in the presence of large interference fields such as the magnetic field of the Earth and are operational a...

Descripción completa

Detalles Bibliográficos
Autores principales: Elzenheimer, Eric, Bald, Christin, Engelhardt, Erik, Hoffmann, Johannes, Hayes, Patrick, Arbustini, Johan, Bahr, Andreas, Quandt, Eckhard, Höft, Michael, Schmidt, Gerhard
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8838141/
https://www.ncbi.nlm.nih.gov/pubmed/35161764
http://dx.doi.org/10.3390/s22031018
_version_ 1784650052695752704
author Elzenheimer, Eric
Bald, Christin
Engelhardt, Erik
Hoffmann, Johannes
Hayes, Patrick
Arbustini, Johan
Bahr, Andreas
Quandt, Eckhard
Höft, Michael
Schmidt, Gerhard
author_facet Elzenheimer, Eric
Bald, Christin
Engelhardt, Erik
Hoffmann, Johannes
Hayes, Patrick
Arbustini, Johan
Bahr, Andreas
Quandt, Eckhard
Höft, Michael
Schmidt, Gerhard
author_sort Elzenheimer, Eric
collection PubMed
description Dedicated research is currently being conducted on novel thin film magnetoelectric (ME) sensor concepts for medical applications. These concepts enable a contactless magnetic signal acquisition in the presence of large interference fields such as the magnetic field of the Earth and are operational at room temperature. As more and more different ME sensor concepts are accessible to medical applications, the need for comparative quality metrics significantly arises. For a medical application, both the specification of the sensor itself and the specification of the readout scheme must be considered. Therefore, from a medical user’s perspective, a system consideration is better suited to specific quantitative measures that consider the sensor readout scheme as well. The corresponding sensor system evaluation should be performed in reproducible measurement conditions (e.g., magnetically, electrically and acoustically shielded environment). Within this contribution, an ME sensor system evaluation scheme will be described and discussed. The quantitative measures will be determined exemplarily for two ME sensors: a resonant ME sensor and an electrically modulated ME sensor. In addition, an application-related signal evaluation scheme will be introduced and exemplified for cardiovascular application. The utilized prototype signal is based on a magnetocardiogram (MCG), which was recorded with a superconducting quantum-interference device. As a potential figure of merit for a quantitative signal assessment, an application specific capacity (ASC) is introduced. In conclusion, this contribution highlights metrics for the quantitative characterization of ME sensor systems and their resulting output signals in biomagnetism. Finally, different ASC values and signal-to-noise ratios (SNRs) could be clearly presented for the resonant ME sensor (SNR: [Formula: see text] dB, ASC: [Formula: see text] dB Hz) and also the electrically modulated ME sensor (SNR: [Formula: see text] dB, ASC: 23 dB Hz), showing that the electrically modulated ME sensor is better suited for a possible MCG application under ideal conditions. The presented approach is transferable to other magnetic sensors and applications.
format Online
Article
Text
id pubmed-8838141
institution National Center for Biotechnology Information
language English
publishDate 2022
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-88381412022-02-13 Quantitative Evaluation for Magnetoelectric Sensor Systems in Biomagnetic Diagnostics Elzenheimer, Eric Bald, Christin Engelhardt, Erik Hoffmann, Johannes Hayes, Patrick Arbustini, Johan Bahr, Andreas Quandt, Eckhard Höft, Michael Schmidt, Gerhard Sensors (Basel) Article Dedicated research is currently being conducted on novel thin film magnetoelectric (ME) sensor concepts for medical applications. These concepts enable a contactless magnetic signal acquisition in the presence of large interference fields such as the magnetic field of the Earth and are operational at room temperature. As more and more different ME sensor concepts are accessible to medical applications, the need for comparative quality metrics significantly arises. For a medical application, both the specification of the sensor itself and the specification of the readout scheme must be considered. Therefore, from a medical user’s perspective, a system consideration is better suited to specific quantitative measures that consider the sensor readout scheme as well. The corresponding sensor system evaluation should be performed in reproducible measurement conditions (e.g., magnetically, electrically and acoustically shielded environment). Within this contribution, an ME sensor system evaluation scheme will be described and discussed. The quantitative measures will be determined exemplarily for two ME sensors: a resonant ME sensor and an electrically modulated ME sensor. In addition, an application-related signal evaluation scheme will be introduced and exemplified for cardiovascular application. The utilized prototype signal is based on a magnetocardiogram (MCG), which was recorded with a superconducting quantum-interference device. As a potential figure of merit for a quantitative signal assessment, an application specific capacity (ASC) is introduced. In conclusion, this contribution highlights metrics for the quantitative characterization of ME sensor systems and their resulting output signals in biomagnetism. Finally, different ASC values and signal-to-noise ratios (SNRs) could be clearly presented for the resonant ME sensor (SNR: [Formula: see text] dB, ASC: [Formula: see text] dB Hz) and also the electrically modulated ME sensor (SNR: [Formula: see text] dB, ASC: 23 dB Hz), showing that the electrically modulated ME sensor is better suited for a possible MCG application under ideal conditions. The presented approach is transferable to other magnetic sensors and applications. MDPI 2022-01-28 /pmc/articles/PMC8838141/ /pubmed/35161764 http://dx.doi.org/10.3390/s22031018 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Elzenheimer, Eric
Bald, Christin
Engelhardt, Erik
Hoffmann, Johannes
Hayes, Patrick
Arbustini, Johan
Bahr, Andreas
Quandt, Eckhard
Höft, Michael
Schmidt, Gerhard
Quantitative Evaluation for Magnetoelectric Sensor Systems in Biomagnetic Diagnostics
title Quantitative Evaluation for Magnetoelectric Sensor Systems in Biomagnetic Diagnostics
title_full Quantitative Evaluation for Magnetoelectric Sensor Systems in Biomagnetic Diagnostics
title_fullStr Quantitative Evaluation for Magnetoelectric Sensor Systems in Biomagnetic Diagnostics
title_full_unstemmed Quantitative Evaluation for Magnetoelectric Sensor Systems in Biomagnetic Diagnostics
title_short Quantitative Evaluation for Magnetoelectric Sensor Systems in Biomagnetic Diagnostics
title_sort quantitative evaluation for magnetoelectric sensor systems in biomagnetic diagnostics
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8838141/
https://www.ncbi.nlm.nih.gov/pubmed/35161764
http://dx.doi.org/10.3390/s22031018
work_keys_str_mv AT elzenheimereric quantitativeevaluationformagnetoelectricsensorsystemsinbiomagneticdiagnostics
AT baldchristin quantitativeevaluationformagnetoelectricsensorsystemsinbiomagneticdiagnostics
AT engelhardterik quantitativeevaluationformagnetoelectricsensorsystemsinbiomagneticdiagnostics
AT hoffmannjohannes quantitativeevaluationformagnetoelectricsensorsystemsinbiomagneticdiagnostics
AT hayespatrick quantitativeevaluationformagnetoelectricsensorsystemsinbiomagneticdiagnostics
AT arbustinijohan quantitativeevaluationformagnetoelectricsensorsystemsinbiomagneticdiagnostics
AT bahrandreas quantitativeevaluationformagnetoelectricsensorsystemsinbiomagneticdiagnostics
AT quandteckhard quantitativeevaluationformagnetoelectricsensorsystemsinbiomagneticdiagnostics
AT hoftmichael quantitativeevaluationformagnetoelectricsensorsystemsinbiomagneticdiagnostics
AT schmidtgerhard quantitativeevaluationformagnetoelectricsensorsystemsinbiomagneticdiagnostics