Emergency Magnet Rundown Unit ("Quench Button"): The EMRU initiates a controlled quench and turns off the magnetic field. The electrical power remains on. Like the Emergency Shutdown ("Power Off" switch) the EMRU is often a big red button located on the external wall of the magnet room near the door.

The Quench Button, also known as Magnet Stop or ERDU, has an important function when in environments prepared for exams with MRI equipment. Today we are going to explain a little more about it. First, we need to explain that superconducting MRI equipment has a very strong magnetic field, so accidents can happen if safety regulations are not ...

1.主动失超 这里指的是按下 失超开关 （Emergency Rump Down Unit, ERDU）后发生的失超。失超开关按下之后会加热磁体中的一个特殊的加热器（Quench heater），这个加热器可以主动的加热一小段主线圈，从而引起连锁反应最终导致失超现象的发生。

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2016年6月6日 · 紧急失超开关又称为磁体急停单元（Emergency Run-Down Unit ，ERDU），是人工强制主动失超的控制开关，装于磁体间内靠近门口的墙上，其作用是在紧急和危险情况下迅速使静磁场削减为零。该开关仅用于地震、火灾和危及受检者生命等突发事件时使用。

2024年2月28日 · 1.主动失超，这里指的是按下矢超开关（ERDU-Emergency Rump Down Unit）后发生的失超。 前面讲过退场需要长时间的过程，同时还需要专用工具，在紧急情况时（如果不马上退场会导致威胁人生命的情况发生），退场过程所需要的时间显然是不能够接受的，必须 …

挤压球、对讲机、ECG、呼吸及脉搏门控装置. 查看检查床和磁体周围有无液体,以避免滑倒. 体内装有心脏起搏器,除外起搏 器为新触碰此开关。 按下此开关型MRI兼容性产品的情况;不会切断磁共振系统的电. 体内植入动脉瘤夹、电子 耳蜗、磁性金源,只会使磁体瞬间失去属药物灌注泵、神经刺激器等装置;磁性。 按下此开关后,请及时顺时针旋转按钮恢复到初始状态,并拨打4008105888,由西门子医疗售后服务人员现场恢复设备运行。 体内有金属异物、人工关节、假肢、假体、固定 …

2024年2月19日 · MEU，磁体状态控制模块，对于冷头循环来说作用是监控磁体内部压力情况，对于4K冷头来说，冷头可以把氦气液化，但是如果不加以控制随着磁体内部氦气越来越少内部压力必然随之减少最终成为负压。 为了解决这个问题就需要进行压力动态控制，主要有两级控制： a.在压力低于第一阈值（30mbar）的时候加热Bath heater对液氦加热从而动态保持压力稳定。 b.当磁体压力进一步下降到第二阈值（10mbar）时为了保证磁体内部正压状态停止压缩机工作强制提 …

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Access to MRI Unit: The personnel listed above will be provided with electronic and key access to MRI Unit. The MRI Technologist will also have key access to the MR scan room (Zone IV). For emergency access to the MR scan room, a key will be stored in a breakable glass case located in the MR control room