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评估在整个 COVID-19 大流行期间佩戴的 FFP3 呼吸面罩的 MRI 安全性、成像伪影和网格变形。

MRI safety, imaging artefacts, and grid distortion evaluated for FFP3 respiratory masks worn throughout the COVID-19 pandemic.

机构信息

Cardiff University Brain Research Imaging Centre (CUBRIC), School of Psychology, Cardiff University, Cardiff CF24 4HQ, UK; Cardiff School of Engineering, Cardiff University, Queens Buildings, 14-17 The Parade, Cardiff, CF24 3AA, UK.

Cardiff School of Engineering, Cardiff University, Queens Buildings, 14-17 The Parade, Cardiff, CF24 3AA, UK.

出版信息

Clin Radiol. 2022 Aug;77(8):e660-e666. doi: 10.1016/j.crad.2022.05.001. Epub 2022 May 16.

DOI:10.1016/j.crad.2022.05.001
PMID:35654622
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9108088/
Abstract

AIM

To determine which filtering face piece (FFP3) respirators worn throughout the COVID-19 pandemic are safe for magnetic resonance imaging (MRI).

MATERIALS AND METHODS

Three clinical MRI sequences were performed to assess imaging artefacts, grid distortion, and local heating for eight commercially available FFP3 respirators. All examinations were performed at Cardiff University Brain Research Imaging Centre using a 3 T Siemens Magnetom Prisma with a 64-channel head and neck coil. Each FFP3 mask was positioned on a custom-developed three-dimensional (3D) head phantom for testing.

RESULTS

Five of the eight FFP3 masks contained ferromagnetic components and were regarded as "MRI unsafe". One mask was considered "MRI conditional" and only two masks were deemed "MRI safe" for both MRI staff and patients. Temperature strips positioned at the nasal bridge of the phantom did not exhibit local heating. A maximum grid distortion of 5 mm was seen in the anterior portion of the head of the ferromagnetic FFP3 masks.

CONCLUSION

This study has demonstrated the importance of assessing respiratory FFP3 masks for use in and around MRI machines. Future research involving FFP3 masks can be conducted safely by following the procedures laid out in this study.

摘要

目的

确定在整个 COVID-19 大流行期间佩戴的哪种过滤式口罩（FFP3）在磁共振成像（MRI）中是安全的。

材料和方法

为评估 8 种市售 FFP3 口罩的成像伪影、网格变形和局部加热，进行了 3 项临床 MRI 序列检查。所有检查均在卡迪夫大学脑研究成像中心使用配备 64 通道头颈部线圈的 3.0T 西门子 Magnetom Prisma 进行。将每个 FFP3 口罩放置在定制的三维（3D）头部体模上进行测试。

结果

8 个 FFP3 口罩中有 5 个含有铁磁组件，被认为是“MRI 不安全”。有一个口罩被认为是“MRI 条件性”，只有两个口罩被认为对 MRI 工作人员和患者都是“MRI 安全”的。放置在体模鼻梁处的温度条没有显示局部加热。在铁磁 FFP3 口罩的头部前部观察到最大网格变形为 5 毫米。

结论

本研究表明评估用于 MRI 机器内外的呼吸 FFP3 口罩的重要性。通过遵循本研究中规定的程序，可以安全地进行涉及 FFP3 口罩的未来研究。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e3fe/9108088/7b1c49dbe441/gr5_lrg.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e3fe/9108088/c893579b9ce7/gr1_lrg.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e3fe/9108088/1a19297f7813/gr2_lrg.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e3fe/9108088/2c014fef2e5b/gr3_lrg.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e3fe/9108088/d9f864dffbde/gr4_lrg.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e3fe/9108088/7b1c49dbe441/gr5_lrg.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e3fe/9108088/c893579b9ce7/gr1_lrg.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e3fe/9108088/1a19297f7813/gr2_lrg.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e3fe/9108088/2c014fef2e5b/gr3_lrg.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e3fe/9108088/d9f864dffbde/gr4_lrg.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e3fe/9108088/7b1c49dbe441/gr5_lrg.jpg

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