【摘 要】
：
CT球管和X线球管的构造基本一致 ,但是由于CT机连续工作的特性 ,要求球管热容量大 ,因而带有油循环散热装置。从故障分析 ,球管损坏有如下原因。1 灯丝开路或半开路故障现象
【机 构】
：
河南省焦作市人民医院CT室,河南省焦作市人民医院CT室,河南省焦作市公费医院 454002,454002,454001
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CT球管和X线球管的构造基本一致 ,但是由于CT机连续工作的特性 ,要求球管热容量大 ,因而带有油循环散热装置。从故障分析 ,球管损坏有如下原因。1 灯丝开路或半开路故障现象表现为扫描时有高压加上 ,但无管电流或电流不稳定。对于X线球管来讲 ,只要阴极灯丝加热到有电子发射能
CT tube and X-ray tube structure is basically the same, but due to the continuous operation of the CT machine features, requiring large tube heat capacity, which with oil circulation cooling device. From the failure analysis, the ball tube damage for the following reasons. A filament open or semi-open circuit failure phenomenon manifested as scanning with high pressure plus, but no tube current or current instability. For X-ray tubes, the cathode filament is heated to have electron emission energy
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