Bahaloo Maryam, Davari Mohammad Hossein, Sobhan Mohammad, Mirmohammadi Seyyed Jalil, Jalalian Mohammad Taghi, Zare Sakhvidi Mohammad Javad, Shamsi Farimah, Mirfendereski Sam, Mollasadeghi Abolfazl, Mehrparvar Amir Houshang
Industrial Diseases Research Center, Shahid Sadoughi University of Medical Sciences, Yazd 89138-14389, Iran.
Department of Radiology, Shahid Sadoughi University of Medical Sciences, Yazd 89138-14389, Iran.
Radiol Res Pract. 2019 Jun 17;2019:8756579. doi: 10.1155/2019/8756579. eCollection 2019.
Exposure to high intensity noise produced by MRI is a cause for concern. This study was conducted to determine the temporary and permanent effects of exposure to noise created by performing MRI on the hearing threshold of the subjects using conventional and extended high frequency audiometry.
This semiexperimental study was performed on 35 patients referred to Shahid Rahnemoun Hospital for head and neck MRI due to different clinical conditions. The hearing threshold of patients was measured before, immediately after, and 24 hours after performing 1.5 Tesla MRI using conventional and extended high frequency audiometry. SPSS version 18 was used to compare the mean hearing thresholds before and after MRI using paired T test and repeated measures analysis.
Comparison of auditory thresholds in conventional and extended high frequencies before and immediately after MRI showed a significant shift at 4 KHz (P = 0.008 and P = 0.08 for right and left ears), 6 KHz (P = 0.03 and P = 0.01 for right and left ears), and 14 KHz (P =0.03 and P = 0.31 for right and left ears). However, there was no significant difference between audiometric thresholds before and 24 hours after MRI.
Noise due to 1.5 Tesla MRI can only cause transient threshold shift.
暴露于磁共振成像（MRI）产生的高强度噪声令人担忧。本研究旨在使用传统和扩展高频听力测定法，确定进行MRI时产生的噪声暴露对受试者听力阈值的暂时和永久影响。
本半实验性研究对35例因不同临床情况转诊至沙希德拉赫内蒙医院进行头颈部MRI检查的患者进行。在使用1.5特斯拉MRI检查前、检查后立即以及检查后24小时，使用传统和扩展高频听力测定法测量患者的听力阈值。使用SPSS 18版软件，通过配对t检验和重复测量分析比较MRI检查前后的平均听力阈值。
MRI检查前后传统和扩展高频的听阈比较显示，在4千赫兹（右耳P = 0.008，左耳P = 0.08）、6千赫兹（右耳P = 0.03，左耳P = 0.01）和14千赫兹（右耳P = 0.03，左耳P = 0.31）处有显著变化。然而，MRI检查前和检查后24小时的听力测定阈值之间没有显著差异。
1.5特斯拉MRI产生的噪声只会导致暂时阈移。
