MRI设备氦气放空管道和回收系统的研制

Development of Helium Blowdown Tube and Helium Recovery System for MRI Facility

在ＭＲＩ核磁共振成象设备中，通常将超导磁体安装在ＲＦ射频室内（全屏蔽状况）或室外（半屏蔽状况）。本文对上述两种情况下的氦气放空管道和回收系统的工作原理、技术要求和使用情况做了介绍。

In MRI nuclear magnetism resonance image facility,its supercon-ducting magnet is installed in the RF chamber(full screen)or outside the RF chamber(half screen).The operation principles,technical requirements and service conditions for the two different kinds of helium blowdown tu-bes and helium recovery system are presented.