Magnetic resonance conditionality of abandoned leads from active implantable medical devices at 1.5 T
Magnetic resonance conditionality of abandoned leads from active implantable medical devices at 1.5 T
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1.5 T 下有源植入式医疗器械废弃导线的磁共振条件
DOI：
10.1002/mrm.28967
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发表时间：
2021
影响因子：
3.3
通讯作者：
Chen, Ji
中科院分区：
文献类型：
--
作者：
Wang, Yu;Guo, Ran;Hu, Wei;Zheng, Jianfeng;Wang, Qingyan;Jiang, Jay;Kurpad, Krishna K. N.;Kaula, Norbert;Long, Stuart;Chen, Ji
目的在磁共振扫描期间，主动植入式医疗器械(AIMD)中的废弃导线可能会在导线尖端受到过热，这取决于应用于近端接触的终端类型(近端治疗)。研究了不同的近端处理方法(即，[1]自由暴露在组织中，[2]与组织接触的金属端接，或[3]用塑料盖住，从而完全绝缘，对射频诱导的铅尖加热的影响)。建议采用一种技术来确保MR条件性AIMD导联即使在废弃的情况下仍保持MR条件性。方法本研究对三种MR条件性AIMD([1]一种骶神经调节系统、[2]一种心律管理起搏器系统和[3]一种脑深部刺激系统)的废弃导线进行了研究。对4种虚拟人体模型(FATS、Duke、Ella和Billie)不同近端处理的计算铅尖模型(即传递函数)进行了测量和评估，并与完整MR条件性AIMD系统的铅尖加热进行了比较。结果废弃金属近端覆盖导线的平均和最大铅尖加热始终低于完整AIMD系统。结论三种AIMD在1.5T磁共振扫描下，射频诱导的导线尖端加热强烈依赖于近端导线的终止。在被测导线的近端应用金属帽可以显著减少射频诱导的导线尖端加热。
PurposeDuring MR scans, abandoned leads from active implantable medical devices (AIMDs) can experience excessive heating at the lead tip, depending on the type of termination applied to the proximal contacts (proximal end treatment). The influence of different proximal end treatments (ie, [1] freely exposed in the tissue, [2] terminated with metal in contact with the tissue, or [3] capped with plastic, and thereby fully insulated, on the RF‐induced lead‐tip heating) are studied. A technique to ensure that MR Conditional AIMD leads remain MR Conditional even when abandoned is recommended.MethodsAbandoned leads from three MR Conditional AIMDs ([1] a sacral neuromodulation system, [2] a cardiac rhythm management pacemaker system, and [3] a deep brain stimulator system) were investigated in this study. The computational lead models (ie, the transfer functions) for different proximal end treatments were measured and used to assess the in vivo lead‐tip heating for four virtual human models (FATS, Duke, Ella, and Billie) and compared with the lead‐tip heating of the complete MR Conditional AIMD system.ResultThe average and maximum lead‐tip heating for abandoned leads proximally capped with metal is always lower than that from the complete AIMD system. Abandoned leads proximally insulated could lead to an average in vivo temperature rise up to 3.5 times higher than that from the complete AIMD system.ConclusionFor the three investigated AIMDs under 1.5T MR scanning, our results indicate that RF‐induced lead‐tip heating of abandoned leads strongly depends on the proximal lead termination. A metallic cap applied to the proximal termination of the tested leads could significantly reduce the RF‐induced lead‐tip heating.
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发表时间：
2019
期刊：
IEEE transactions on electromagnetic compatibility (Print)
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DOI：
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发表时间：
2015-01-01
影响因子：
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