基本信息:
- 专利标题： Means for preventing excessive heating of an X-ray tube window
- 专利标题（中）：Einrichtung zur Vermeidung einerÜberhitzungdes Fensters einerRöntgenröhre
- 申请号：EP98308723.0 申请日：1998-10-26
- 公开(公告)号：EP0924742A3 公开(公告)日：2000-01-05
- 发明人： Harris, Jason P. , Carlson, Gerard J. , Miller, Lester D.
- 申请人： PICKER INTERNATIONAL, INC.
- 申请人地址： 595 Miner Road Cleveland, Ohio 44143 US
- 专利权人： PICKER INTERNATIONAL, INC.
- 当前专利权人： PICKER INTERNATIONAL, INC.
- 当前专利权人地址： 595 Miner Road Cleveland, Ohio 44143 US
- 代理机构： Waters, Jeffrey
- 优先权： US994637 19971219
- 主分类号： H01J35/18
- IPC分类号： H01J35/18
摘要：
An x-ray tube includes an envelope (13) defining an evacuated chamber and having a window (30) transmissive to x-rays. An anode assembly and a cathode assembly operate within the envelope to produce x-rays which travel through the window transmissive to x-rays towards a patient or subject under examination. A shield transmissive (32) to x-rays is coupled to the envelope and positioned such that x-rays travelling through the window transmissive to x-rays must first travel through the shield. The shield prevents substantially all secondary electrons created during the production of x-rays from coming into contact with the window transmissive to x-rays thereby preventing excessive heating of the window transmissive to x-rays. An electrode (50) defined by the envelope in a region proximate the window transmissive to x-rays may additionally or alternatively be used to prevent secondary electrons from reaching the window transmissive to x-rays.
摘要（中）：
X射线管包括限定抽真空室并具有透射X射线的窗口（30）的外壳（13）。 阳极组件和阴极组件在外壳内操作以产生X射线，X射线穿过透射窗口的X射线朝向被检查的患者或受试者。 对X射线的屏蔽透射（32）耦合到外壳并定位成使得穿过透射到x射线的窗口的x射线必须首先穿过屏蔽。 屏蔽层防止在X射线生成期间产生的所有二次电子与透射X射线的窗口接触，从而防止透射X射线的窗口的过度加热。 在靠近x射线的窗口附近的区域中由外壳限定的电极（50）可以附加地或替代地用于防止二次电子到达透射X射线的窗口。