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European Radiology

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01-10-2011 | Magnetic Resonance

Development and evaluation of a small and mobile Magneto Alert Sensor (MALSE) to support safety requirements for magnetic resonance imaging

Authors: Conrad Martin, Tobias Frauenrath, Celal Özerdem, Wolfgang Renz, Thoralf Niendorf

Published in: European Radiology | Issue 10/2011

Abstract

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.

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Title: Development and evaluation of a small and mobile Magneto Alert Sensor (MALSE) to support safety requirements for magnetic resonance imaging
Authors: Conrad Martin
Tobias Frauenrath
Celal Özerdem
Wolfgang Renz
Thoralf Niendorf
Publication date: 01-10-2011
Publisher: Springer-Verlag
Published in: European Radiology / Issue 10/2011
Print ISSN: 0938-7994
Electronic ISSN: 1432-1084
DOI: https://doi.org/10.1007/s00330-011-2153-z

At a glance: The STEP trials

Springer Medicine

Development and evaluation of a small and mobile Magneto Alert Sensor (MALSE) to support safety requirements for magnetic resonance imaging

Abstract

Objective

Methods

Results

Conclusions

At a glance: The STEP trials

Springer Medicine

Abstract

Objective

Methods

Results

Conclusions

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