Exposure, health complaints and cognitive performance among employees of an MRI scanners manufacturing department
Article first published online: 22 DEC 2005
Copyright © 2005 Wiley-Liss, Inc.
Journal of Magnetic Resonance Imaging
Volume 23, Issue 2, pages 197–204, February 2006
How to Cite
de Vocht, F., van Drooge, H., Engels, H. and Kromhout, H. (2006), Exposure, health complaints and cognitive performance among employees of an MRI scanners manufacturing department. J. Magn. Reson. Imaging, 23: 197–204. doi: 10.1002/jmri.20485
- Issue published online: 26 JAN 2006
- Article first published online: 22 DEC 2005
- Manuscript Accepted: 26 OCT 2005
- Manuscript Received: 24 NOV 2004
- Philips Medical Systems
- occupational exposure;
- cognitive effects;
- health complaints;
- static fields
To assess sensory effects and other health complaints that are reported by system testers working near magnetic resonance imaging (MRI) magnets, realizing that it is believed that exposure up to 8 T is safe for humans.
Materials and Methods
Levels of exposure to static magnetic fields (SMFs), movement speed during exposure, health complaints, and cognitive performance among employees in an MRI-manufacturing department and at a reference department have been analyzed. Mercury concentrations in urine samples were determined to analyze whether they depend on exposure to SMFs.
Average exposure of system testers was 25.9 mT/8 hours at a 1.0-T system and 40.4 mT/8 hours at a 1.5-T system. Vertigo, metallic taste, and concentration problems were more reported among workers of MRI-fabrication than in the reference department. Cognitive performance was tested outside the SMF, and no significant changes were detected.
This study suggests that any effects on cognitive functions are acute and transient and disappear rapidly after exposure has ended. All complaints, except for headaches, were more frequently reported by “fast movers” than by “slow movers,” and depended on field strength and duration of exposure. Mercury-levels in urine were not affected. J. Magn. Reson. Imaging 2006. © 2005 Wiley-Liss, Inc.