1 INTRODUCTION

One type of cosmetic that has gained recent popularity is the magnetic false eyelash. Some of these magnetic eyelashes are placed onto magnetic eyeliner applied to eye lids, while others come in pairs and clamp around the natural eyelashes. This presents potential safety hazards in the magnetic resonance imaging (MRI) environment. This is because patients may not deem it necessary to disclose this type of cosmetic, the standard MR screening forms often fail to capture these accessories, and the eyelashes may not be readily noticed by the technologists.

MRI artifacts caused by magnetic eyelashes were reported previously.1 However, in this study, we used industry standard testing methods specifically to examine the projectile risk. We quantified the deflection force experienced by magnetic eyelashes from various manufacturers. All tested products produced large deflections, indicative of significant magnetic forces. The translational forces were so strong that other effects (such as rotational forces, heating, and artifacts) could only be tested in a manner that is inconsistent with how a patient would present in a usual clinical setting.

中文翻译：

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磁共振安全评估的新趋势：磁性睫毛。

1引言

最近流行的一种化妆品是磁性假睫毛。这些磁性睫毛中的一些被放置在应用于眼睑的磁性眼线笔上，而其他成对并夹在自然睫毛周围。这在磁共振成像（MRI）环境中存在潜在的安全隐患。这是因为患者可能不认为有必要公开这种类型的化妆品，标准的MR筛查表通常无法捕获这些附件，并且技术人员可能不容易注意到睫毛。

先前已报道了由磁性睫毛引起的MRI伪影。1但是，在这项研究中，我们专门使用了行业标准测试方法来检查弹丸风险。我们量化了来自不同制造商的电磁睫毛所受到的偏转力。所有测试的产品都会产生较大的挠度，表明存在很大的磁力。平移力是如此之强，以至于只能以与患者在常规临床环境中的表现方式不一致的方式来测试其他效果（例如旋转力，加热和伪影）。