Radiology:做磁共振时轰隆隆的噪声对你的听力会产生危害吗?

2017-08-31 shaosai MedSci原创

听性脑干反应(ABR):属短潜伏期电位,一般用短声进行测试。可以与其他听力学检查结合用于鉴别听力损失性质;最常用于检查有无耳蜗后病变:如各波潜伏期延长、波间期延长、双耳间潜伏期或波间期相差明显,以及波形分化变差都提示耳蜗后病变存在的可能性。本研究旨在验证在耳塞及海绵等听力保护装置的保护下,健康志愿者在3.0T多序列MR神经成像扫描时长达51分钟的噪声暴露是否会引起听力阈值的变化,并将结果发表在Ra

听性脑干反应(ABR):属短潜伏期电位,一般用短声进行测试。可以与其他听力学检查结合用于鉴别听力损失性质;最常用于检查有无耳蜗后病变:如各波潜伏期延长、波间期延长、双耳间潜伏期或波间期相差明显,以及波形分化变差都提示耳蜗后病变存在的可能性。本研究旨在验证在耳塞及海绵等听力保护装置的保护下,健康志愿者在3.0T多序列MR神经成像扫描时长达51分钟的噪声暴露是否会引起听力阈值的变化,并将结果发表在Radiology上。

本研究共招募了26名健康成人志愿者,在耳塞和用来制动的海绵垫保护听力的条件下,行3.0TMR神经成像,扫描序列包括:T1加权三维梯度回波序列、T2快速自旋回波序列、扩散张量成像、扩散峰度成像、T2*加权三维多回波梯度序列和血氧水平饱和依赖序列成像。采用自动听力脑干听觉诱发电位(ABR)在检查前24小时、检查后20分钟和25天后评价听力阈值。利用Bonferroni法单向重复测量方差分析来比较三种检查的自动ABR结果,并将部分η 2 (η p 2)作为评价效应量的指标。

结果为,自动ABR表明在MR检查后,与检查前相比平均阈值发生了显着的升高(左耳:4.8 dB ± 9.2 95%CI: 1.09, 8.53], η p 2 = 0.221, P = .013;右耳: 5.2 dB ± 6.9 95%CI: 2.36, 8.02], η p 2 = 0.364, P = .001)。该变化低于40-50 dB暂时性阈值改变,后者与耳蜗神经有关。检查后25天自动ABR与检查前并无显着性差异(左耳:-2.3 dB ± 8.6 95% CI: -5.79, 1.78, η p 2 = 0.069, P = .185;右耳: 0.4 dB ± 7.3 95%CI: -3.35, 2.58], η p 2 = 0.003, P = .791)。

本研究表明,在行3.0 MR神经成像检查时,会产生相当于约为103.5-111.3声压级的听力噪声,这会引起有听力保护的的健康受试者的听力阈值发生暂时性变化。

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    2017-09-02 ysjykql
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    2017-09-02 xinmeili
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    2017-08-31 1dd8c52fm63(暂无匿称)

    学习学习.了解了解

    0

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    2017-08-31 tanxingdoctor

    学习啦!谢谢分享

    0

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众所周知磁共振成像(MRI)和正电子发射断层扫描(PET-CT)是多发性骨髓瘤(MM)患者重要的检查手段。2017年7月在JCO上发表的一篇文章对MM患者进行了一项前瞻性研究,目的是比较MRI和PET-CT对骨损伤的诊断及这些技术的预后价值。