RF-induced heating of capped and uncapped abandoned epicardial leads during MRI at 1.5 T and 3 T.
RF-induced heating of capped and uncapped abandoned epicardial leads during MRI at 1.5 T and 3 T.
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DOI：
10.1109/embc40787.2023.10340533
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发表时间：
2023-07
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关于废弃心外膜导联患者的磁共振成像 (MRI) 安全性的数据很少。很少有研究报道，在 1.5 T 的 MRI 过程中，植入心外膜导线的凝胶体模温度会上升至 76 °C；然而，这些实验中使用的先导轨迹与临床无关。这项工作报告了 MRI 期间在 1.5 T 和 3 T 场强下对带帽和不带帽的废弃心外膜导线配置进行患者特异性射频加热。我们发现，与之前报道的最坏情况模型实验相比，沿着真实的、源自患者的轨迹布线的引线产生的射频加热要低得多。我们还发现，在 1.5 T 和 3 T 下，与胸部或腹部标志处的 MRI 相比，头部成像标志处的 MRI 导致射频加热显着降低。我们的结果表明，废弃心外膜导线的患者可以安全地接受 MRI 进行头部成像，但在胸部和腹部成像时需要谨慎。废弃心外膜导线的患者可以安全地接受 MRI 进行头部成像，但在胸部和腹部成像时需要谨慎。
There is a paucity of data regarding the safety of magnetic resonance imaging (MRI) in patients with abandoned epicardial leads. Few studies have reported temperature rises up to 76 °C during MRI at 1.5 T in gel phantoms implanted with epicardial leads; however, lead trajectories used in these experiments were not clinically relevant. This work reports patient-specific RF heating of both capped and uncapped abandoned epicardial lead configurations during MRI at both 1.5 T and 3 T field strengths. We found that leads routed along realistic, patient-derived trajectories generated substantially lower RF heating than the previously reported worst-case phantom experiments. We also found that MRI at the head imaging landmark leads to substantially lower RF heating compared to MRI at the chest or abdomen landmarks at both 1.5 T and 3 T. Our results suggest that patients with abandoned epicardial leads may safely undergo MRI for head imaging, but caution is warranted during chest and abdominal imaging. Patients with abandoned epicardial leads may safely undergo MRI for head imaging, but caution is warranted during chest and abdominal imaging.