Rathebe Phoka C
Department of Environmental Health, Faculty of Health Sciences, Doornfontein Campus, University of Johannesburg, Johannesburg, P.O. Box 524 South Africa.
Electromagn Biol Med. 2022 Apr 3;41(2):152-162. doi: 10.1080/15368378.2022.2031212. Epub 2022 Feb 10.
This study assessed subjective symptoms associated with exposure to static magnetic fields (SMFs) and radiofrequency (RF) energy, and perceived safety risk of scanners among magnetic resonance (MR) staff working in the 1.5 and 3 T MRI units. A questionnaire survey was completed by 77 clinical imaging staff working in two hospitals (A and B) in the Mangaung metropolitan region. 50 participants working with the MR scanners were regarded as exposed group and 27 participants from CT scan and X-ray departments were classified as control group. The study comprised 57% females and 43% male participants with an average MRI experience of 5.4 years. Using logistic regression, tinnitus was significantly different between various job titles (< .034) and it was reported more often (OR 8:00; CI 1.51, 15.17) by those who worked on a 3 T scanner. Increased years of MRI experience was a significant predictor of headache (< .05), and reporting of nausea was significantly different between various job titles (p < .01). There was an increased risks of reporting vertigo often among female participants (OR: 4.43; CI 0.91, 21.47), those with 5-15 years of MRI experience (OR: 2.09; CI 0.47, 9.34), and those with a light to moderate workload (OR: 2.70; CI 0.49, 14.86). Using linear regression, presence in zone IV during image acquisitioning was the only significant predictor for the sensation of glowing (p < .000). Movement of head/ upper body in the scanner bore was a significant predictor of nausea (< .026), vertigo (< .014), instability when standing (< .014), and a metallic taste (< .031). There was no correlation between reporting of symptoms and perceived risk of scanners. However, shift duration (r = 0.576), movement of head/upper body in the scanner bore (r = 0.424), and strength of the scanners (r = 0.299) were significantly correlated with perceived risk of scanners. MRI safety training and a comprehensive occupational health and safety program are necessary.
本研究评估了在1.5T和3T磁共振成像（MRI）设备工作的磁共振（MR）工作人员接触静磁场（SMF）和射频（RF）能量时的主观症状，以及对扫描设备的感知安全风险。曼加翁都会区两家医院（A和B）的77名临床影像工作人员完成了问卷调查。50名使用MR扫描仪的参与者被视为暴露组，27名来自CT扫描和X射线科室的参与者被归类为对照组。研究包括57%的女性和43%的男性参与者，平均MRI工作经验为5.4年。使用逻辑回归分析发现，不同职称的耳鸣情况存在显著差异（<0.034），在3T扫描仪上工作的人员报告耳鸣的情况更为常见（比值比8.00；置信区间1.51，15.17）。MRI工作年限增加是头痛的显著预测因素（<0.05），不同职称的恶心报告情况存在显著差异（p<0.01）。女性参与者（比值比：4.43；置信区间0.91，21.47）、有5至15年MRI工作经验的人员（比值比：2.09；置信区间0.47，9.34）以及工作量为轻度至中度的人员（比值比：2.70；置信区间0.49，14.86）经常报告眩晕的风险增加。使用线性回归分析发现，图像采集期间在IV区是有发热感的唯一显著预测因素（p<0.000）。在扫描孔内头部/上身的移动是恶心（<0.026）、眩晕（<0.014）、站立不稳（<0.014）和有金属味（<0.031）的显著预测因素。症状报告与对扫描设备的感知风险之间没有相关性。然而，轮班时长（r=0.576）、在扫描孔内头部/上身的移动（r=0.424）以及扫描设备的强度（r=0.299）与对扫描设备的感知风险显著相关。MRI安全培训和全面的职业健康与安全计划是必要的。
