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Updated: Jan 20, 2026

Optogenetic Functional MRI

Optogenetic Functional MRI

Published on: April 19, 2016

在临床MRI系统的使用寿命期间,MRI法拉第子性能

Jamie Small¹, David Price¹, Joe Martin¹

¹Guy's and St. Thomas' NHS Foundation Trust, London, UK.

Magma (New York, N.Y.)

|January 19, 2026

概括

随着时间的推移,MRI法拉第 (FC) 性能可能会降低,在验收测试中,许多规格都会失败. 然而,退化很少影响图像质量,这表明维护应该取代老化的FC.

科学领域:

医学成像物理医学成像物理
电磁兼容性电磁兼容性是一个

背景情况:

磁力共振成像法拉第 (FC) 对于屏蔽外部射频干扰至关重要.
临床环境中FCs的长期性能和降解模式没有得到充分的记录.

研究的目的:

在临床MRI系统的整个生命周期中评估MRI法拉第的性能.
在MRI扫描仪升级时,提供有关FC重新使用或更换的决策数据.

主要方法:

在40个MRI系统的验收测试中测量了FC性能.
在其他11个不同年龄的系统中评估了FC.
与供应商规格和初始构建测量结果进行比较.

主要成果:

63%的FC在验收测试中至少失败了一项规范.
在MRI图像上没有观察到任何射频 (RF) 工件,尽管性能偏差.
与FC年龄相关的显著性能下降,特别是在门窗上.

结论:

从制造到最初的临床使用,FC性能可能会下降.
通常需要比规格低的大量降解才能使射频器件在实践中出现.
在解决性能问题时,MRI检查室门的日常维护可能比昂贵的FC更换更有效.

关键词:

法拉第子法拉第子这就是为什么MRI是MRI.无线电频率衰减的使用方法无线电波干扰无线电波干扰

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