PURPOSE: 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. RESULTS: 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. CONCLUSION: 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. (c) 2005 Wiley-Liss, Inc.
PURPOSE: 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. RESULTS: 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. CONCLUSION: 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. (c) 2005 Wiley-Liss, Inc.
Authors: Frank de Vocht; Jonna Wilén; Kjell Hansson Mild; Lotte E van Nierop; Pauline Slottje; Hans Kromhout Journal: J Med Syst Date: 2011-01-26 Impact factor: 4.460
Authors: Frank de Vocht; Evridiki Batistatou; Anna Mölter; Hans Kromhout; Kristel Schaap; Martie van Tongeren; Stuart Crozier; Penny Gowland; Stephen Keevil Journal: Eur Radiol Date: 2015-03-13 Impact factor: 5.315
Authors: Bryan K Ward; Dale C Roberts; Charles C Della Santina; John P Carey; David S Zee Journal: Ann N Y Acad Sci Date: 2015-03-03 Impact factor: 5.691
Authors: M Cosottini; D Frosini; L Biagi; I Pesaresi; M Costagli; G Tiberi; M Symms; M Tosetti Journal: Eur Radiol Date: 2014-05-10 Impact factor: 5.315
Authors: Valentina Hartwig; Giulio Giovannetti; Nicola Vanello; Massimo Lombardi; Luigi Landini; Silvana Simi Journal: Int J Environ Res Public Health Date: 2009-06-10 Impact factor: 3.390