Patel Mita, Williamsom Robert A, Dorevitch Samuel, Buchanan Susan
Division of Environmental and Occupational Health Sciences, Occupational Medicine Residency Training Program, University of Illinois, Chicago School of Public Health, Chicago, Illinois, USA.
J Occup Environ Med. 2008 May;50(5):576-83. doi: 10.1097/JOM.0b013e318162f5d6.
To objectively evaluate workers' sensory symptoms and vestibular function after exposure to a strong, new generation 9.4-T Magnetic Resonance Imaging (MRI) scanner.
Six MRI employees underwent standardized electronystagmographic evaluation, postural testing, and caloric function at baseline evaluation, 30 minutes postexposure to 9.4 T static field and at a 3-month follow-up.
All participants noted sensory symptoms after exposure. No overall deterioration in vestibular function was noted following 30-minute exposure or at a 3-month follow-up. A higher occurrence of tonic vestibular asymmetry, hyperreactive caloric responses, and spontaneous nystagmus was noted compared with that of the normal population.
Workers exposed to the new, stronger MRIs experience sensory symptoms but it is unclear as yet whether long-term vestibular damage occurs. The higher rates of vestibular changes noted could argue for improved worker surveillance and exposure control.
客观评估接触新一代9.4-T强磁共振成像（MRI）扫描仪的工作人员的感觉症状和前庭功能。
6名MRI工作人员在基线评估、暴露于9.4 T静磁场30分钟后以及3个月随访时接受了标准化眼震电图评估、姿势测试和冷热试验。
所有参与者在暴露后均出现感觉症状。暴露30分钟后或3个月随访时，未发现前庭功能整体恶化。与正常人群相比，发现紧张性前庭不对称、冷热反应过敏和自发性眼震的发生率更高。
接触新型更强MRI的工作人员会出现感觉症状，但长期前庭损伤是否会发生尚不清楚。所观察到的较高前庭变化率表明需要加强对工作人员的监测和暴露控制。
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