Effect of 3-tesla magnetic resonance imaging on various pressure programmable shunt valves
Effect of 3-tesla magnetic resonance imaging on various pressure programmable shunt valves
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DOI：
10.3171/ped.2005.103.2.0163
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发表时间：
2005-08-01
影响因子：
4.1
通讯作者：
Ogawa, A
中科院分区：
文献类型：
--
作者：
Inoue, T;Kuzu, Y;Ogawa, A
Object.本研究调查了暴露于3特斯拉磁场后几种磁性压力可编程阀的阀压设置的变化。对4种压力可调分流阀中的5种进行了试验：Sophy Polaris、Sophy SM 8、Codman-Hakim和Medtronic Strata。首先，将瓣膜朝向3特斯拉静磁场推进。其次，使用射频磁场生成T-1、T-2和弥散加权磁共振（MR）图像。压力设置的任何变化均通过使用指南针或X线摄影进行目视检查来观察。除Sophy Polaris外，所有可调压阀的压力设置均在暴露于静磁场后发生变化。在Sophy Polarum中暴露于静态和射频磁场（T-1、T-2和弥散加权MR成像）后，研究的所有压力设置均未发生变化。Sophy Polaris瓣膜允许需要可调压阀的分流依赖患者接受3 T MR成像。
Object. This study investigated the changes in the valve pressure setting of several magnetic pressure-programmable valves after exposure to a 3-tesla magnetic field.Methods. Five each Of four types of pressure-programmable shunt valves were tested: Sophy Polaris, Sophy SM8, Codman-Hakim, and Medtronic Strata. First, the valves were advanced toward the 3-tesla static magnetic field. Second, T-1-, T-2-, and diffusion-weighted magnetic resonance (MR) images were generated with a radiofrequency magnetic field. Any changes in the pressure setting were observed by Visual inspection with a compass or radiography.The pressure settings were changed after exposure to the static magnetic field in all programmable valves except for the Sophy Polaris. All pressure settings studied were unchanged after exposure to both static and radiofrequency magnetic fields (T-1-, T-2-, and diffusion-weighted MR imaging) in the Sophy Polaris.Conclusions. The Sophy Polaris valve allows shunt-dependent patients who need a programmable valve to undergo 3-tesla MR imaging.