Development and evaluation of a small and mobile Magneto Alert Sensor (MALSE) to support safety requirements for magnetic resonance imaging
- Objective The purpose of this study is to (i) design a small and mobile Magnetic field ALert SEnsor (MALSE), (ii) to carefully evaluate its sensors to their consistency of activation/deactivation and sensitivity to magnetic fields, and (iii) to demonstrate the applicability of MALSE in 1.5 T, 3.0 T and 7.0 T MR fringe field environments. Methods MALSE comprises a set of reed sensors, which activate in response to their exposure to a magnetic field. The activation/deactivation of reed sensors was examined by moving them in/out of the fringe field generated by 7TMR. Results The consistency with which individual reed sensors would activate at the same field strength was found to be 100% for the setup used. All of the reed switches investigated required a substantial drop in ambient magnetic field strength before they deactivated. Conclusions MALSE is a simple concept for alerting MRI staff to a ferromagnetic object being brought into fringe magnetic fields which exceeds MALSEs activation magnetic field. MALSE can easily be attached to ferromagnetic objects within the vicinity of a scanner, thus creating a barrier for hazardous situations induced by ferromagnetic parts which should not enter the vicinity of an MR-system to occur.
Author: | Conrad Martin, Tobias Frauenrath, Celal Özerdem, Wolfgang Renz, Thoralf Niendorf |
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DOI: | https://doi.org/10.1007/s00330-011-2153-z |
ISSN: | 1432-1084 |
Parent Title (English): | European Radiology |
Publisher: | Springer |
Place of publication: | Berlin, Heidelberg |
Document Type: | Article |
Language: | English |
Year of Completion: | 2011 |
Date of first Publication: | 2011/06/08 |
Tag: | High field MRI; MR safety; MRI; Magneto alert sensor; Uktrahigh field MRI |
Volume: | 21 |
First Page: | 2187 |
Last Page: | 2192 |
Link: | https://doi.org/10.1007/s00330-011-2153-z |
Zugriffsart: | campus |
Institutes: | FH Aachen / Fachbereich Elektrotechnik und Informationstechnik |
collections: | Verlag / Springer |