CT球管的保养与维护（四）

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                    <p style="max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: &#39;Hiragino Sans GB&#39;, &#39;Microsoft YaHei&#39;, Arial, sans-serif; font-size: 16px; line-height: 25.6px; white-space: normal; text-indent: 24pt; text-align: center; box-sizing: border-box !important; word-wrap: break-word !important; background-color: rgb(255, 255, 255);"><strong style="max-width: 100%; text-indent: 24pt; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 12pt; font-family: 宋体; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 24px; box-sizing: border-box !important; word-wrap: break-word !important;">CT球管的选择和使用</span></span></strong><br style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"  /></p><p style="max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: &#39;Hiragino Sans GB&#39;, &#39;Microsoft YaHei&#39;, Arial, sans-serif; font-size: 16px; line-height: 25.6px; white-space: normal; text-indent: 24pt; box-sizing: border-box !important; word-wrap: break-word !important; background-color: rgb(255, 255, 255);"><strong style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><span lang="EN-US" style="max-width: 100%; font-size: 12pt; font-family: 宋体; box-sizing: border-box !important; word-wrap: break-word !important;">A.&nbsp;</span></strong><strong style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 12pt; font-family: 宋体; box-sizing: border-box !important; word-wrap: break-word !important;">正确的选择更换球管：<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><o:p style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"></o:p></span></span></strong></p><p style="max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: &#39;Hiragino Sans GB&#39;, &#39;Microsoft YaHei&#39;, Arial, sans-serif; font-size: 16px; line-height: 25.6px; white-space: normal; text-indent: 24pt; box-sizing: border-box !important; word-wrap: break-word !important; background-color: rgb(255, 255, 255);"><strong style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 12pt; font-family: 宋体; box-sizing: border-box !important; word-wrap: break-word !important;">在<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">CT</span>更换球管时正确的更换球管具有非常大的意义，实践证明选择一个好的球管对球管 的使用寿命影响很大，在球管管芯外部安装几何尺寸相同的情况下，加大球管管芯的热容量会有效的延长球管的使用寿命，而适当的加大球管的焦点尺寸，也会延长球管寿命而焦点的适当加大一般不会对整个<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">CT</span>的图像空间分辨率带来大的影响，因为<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">CT</span>中数据采集系统对图像空间分辨率的影响远大于球管焦点对图像空间分辨率的影响，这种影响一般在图像上是分辨不出来的。<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><o:p style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"></o:p></span></span></strong></p><p style="max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: &#39;Hiragino Sans GB&#39;, &#39;Microsoft YaHei&#39;, Arial, sans-serif; font-size: 16px; line-height: 25.6px; white-space: normal; text-indent: 24pt; box-sizing: border-box !important; word-wrap: break-word !important; background-color: rgb(255, 255, 255);"><strong style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><span lang="EN-US" style="max-width: 100%; font-size: 12pt; font-family: 宋体; box-sizing: border-box !important; word-wrap: break-word !important;">B.&nbsp;</span></strong><strong style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 12pt; font-family: 宋体; box-sizing: border-box !important; word-wrap: break-word !important;">正确的使用操作机器：<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><o:p style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"></o:p></span></span></strong></p><p style="max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: &#39;Hiragino Sans GB&#39;, &#39;Microsoft YaHei&#39;, Arial, sans-serif; font-size: 16px; line-height: 25.6px; white-space: normal; text-indent: 24pt; box-sizing: border-box !important; word-wrap: break-word !important; background-color: rgb(255, 255, 255);"><strong style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 12pt; font-family: 宋体; box-sizing: border-box !important; word-wrap: break-word !important;">在<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">CT</span>的使用过程中，正确的使用<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">CT</span>也是延长球管使用寿命的一个关键，<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">CT</span>在使用操作过程中需要注意以下几个方面。<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><o:p style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"></o:p></span></span></strong></p><p style="max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: &#39;Hiragino Sans GB&#39;, &#39;Microsoft YaHei&#39;, Arial, sans-serif; font-size: 16px; line-height: 25.6px; white-space: normal; text-indent: 24pt; box-sizing: border-box !important; word-wrap: break-word !important; background-color: rgb(255, 255, 255);"><strong style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 12pt; font-family: 宋体; box-sizing: border-box !important; word-wrap: break-word !important;">（一<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">) CT</span>在开机后要经过充分的预热，这样做的目的是让球管能够得到充分的预热，消除球管管芯玻壳中的应力，以避免球管在正常扫描病人时出现球管管芯玻壳炸裂现象。<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><o:p style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"></o:p></span></span></strong></p><p style="max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: &#39;Hiragino Sans GB&#39;, &#39;Microsoft YaHei&#39;, Arial, sans-serif; font-size: 16px; line-height: 25.6px; white-space: normal; text-indent: 24pt; box-sizing: border-box !important; word-wrap: break-word !important; background-color: rgb(255, 255, 255);"><strong style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 12pt; font-family: 宋体; box-sizing: border-box !important; word-wrap: break-word !important;">（二<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">)&nbsp;</span>开始扫描患者时，第一个扫描对象应选择扫描层数少，工作条件低的患者进行扫描，比如先选择头部扫描的患者扫描，这样能够使球管进一步得到充分预热，这样可以进一步降低球管损坏的危险。<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><o:p style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"></o:p></span></span></strong></p><p style="max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: &#39;Hiragino Sans GB&#39;, &#39;Microsoft YaHei&#39;, Arial, sans-serif; font-size: 16px; line-height: 25.6px; white-space: normal; text-indent: 24pt; box-sizing: border-box !important; word-wrap: break-word !important; background-color: rgb(255, 255, 255);"><strong style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 12pt; font-family: 宋体; box-sizing: border-box !important; word-wrap: break-word !important;">（三<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">)&nbsp;</span>在保证扫描图像的清晰度和分辨率的情况下，尽量的降低扫描条件或毫安秒数相同的情况下，选择小毫安长时间曝光都会有效的延长球管使用寿命。<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><o:p style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"></o:p></span></span></strong></p><p style="max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: &#39;Hiragino Sans GB&#39;, &#39;Microsoft YaHei&#39;, Arial, sans-serif; font-size: 16px; line-height: 25.6px; white-space: normal; text-indent: 24pt; box-sizing: border-box !important; word-wrap: break-word !important; background-color: rgb(255, 255, 255);"><strong style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 12pt; font-family: 宋体; box-sizing: border-box !important; word-wrap: break-word !important;">（四<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">)&nbsp;</span>经常注意检查在进行多个患者扫描以后的管套温度，当球管管套温度过高时，应停止扫描进行球管冷却，并且适当延长每个患者之间的等待时间。<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><o:p style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"></o:p></span></span></strong></p><p style="max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: &#39;Hiragino Sans GB&#39;, &#39;Microsoft YaHei&#39;, Arial, sans-serif; font-size: 16px; line-height: 25.6px; white-space: normal; text-indent: 24pt; box-sizing: border-box !important; word-wrap: break-word !important; background-color: rgb(255, 255, 255);"><strong style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 12pt; font-family: 宋体; box-sizing: border-box !important; word-wrap: break-word !important;">（五<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">)&nbsp;</span>在进行机器校正时，要随时注意检查球管的温度，特别是进行大功率项目校正时，必须保证球管有充分的预热，在做表的过程中，保证球管温度不能过高，在有些机 器球管热容量设计的比较小时，更是要千万注意，有很多时候，本来很好的球管，因为做表时单位时间内累计功率过大，造成球管玻壳碎裂或靶面熔化，使球管报 废。<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><o:p style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"></o:p></span></span></strong></p><p style="max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: &#39;Hiragino Sans GB&#39;, &#39;Microsoft YaHei&#39;, Arial, sans-serif; font-size: 16px; line-height: 25.6px; white-space: normal; text-indent: 24pt; box-sizing: border-box !important; word-wrap: break-word !important; background-color: rgb(255, 255, 255);"><strong style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 12pt; font-family: 宋体; box-sizing: border-box !important; word-wrap: break-word !important;">（六<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;">)&nbsp;</span>当球管出现漏油，机器上提示球管过热时，应该立刻停止扫描，对球管进行养护，这时如果要继续使用，很快就会造成球管的完全报废。这样故障的球管，从我们多年的经验看，经过良好的养护，球管还可以使用很长的时间。<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><o:p style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"></o:p></span></span></strong></p><p style="max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-family: &#39;Hiragino Sans GB&#39;, &#39;Microsoft YaHei&#39;, Arial, sans-serif; font-size: 16px; line-height: 25.6px; white-space: normal; text-indent: 24pt; box-sizing: border-box !important; word-wrap: break-word !important; background-color: rgb(255, 255, 255);"><strong style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 12pt; font-family: 宋体; box-sizing: border-box !important; word-wrap: break-word !important;">保证机器设备的完好也是延长球管使用寿命的重要方面，要求机器高压启动是无过冲，高压电压、电流校正准确，旋转阳极驱动电路工作良好等，这些部分都直接影响球管的使用寿命。<span lang="EN-US" style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><o:p style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"></o:p></span></span></strong></p><p><strong style="max-width: 100%; box-sizing: border-box !important; word-wrap: break-word !important;"><span style="max-width: 100%; font-size: 12pt; font-family: 宋体; box-sizing: border-box !important; word-wrap: break-word !important;"><br  /></span></strong></p><p style="white-space: normal; line-height: 24.381px;"><span style="color: rgb(62, 62, 62); font-family: Arial, Verdana, sans-serif; line-height: 1.75em; text-indent: 0em; max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">地址：广州市天河区银利街银利茶叶博览中心E栋4楼E4030室 &nbsp;&nbsp;</span><span style="color: rgb(62, 62, 62); font-family: Arial, Verdana, sans-serif; text-indent: 0em; max-width: 100%; font-size: 14px; line-height: 1.75em; box-sizing: border-box !important; word-wrap: break-word !important;">&nbsp; &nbsp;&nbsp;</span><br  /></p><p style="text-indent: 0em; white-space: normal; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-size: 12px; font-family: Arial, Verdana, sans-serif; line-height: 1.75em; box-sizing: border-box !important; word-wrap: break-word !important; background-color: rgb(255, 255, 255);"><span style="max-width: 100%; font-size: 14px; line-height: 1.75em; box-sizing: border-box !important; word-wrap: break-word !important;">邮编：510507</span></p><p style="text-indent: 0em; white-space: normal; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-size: 12px; font-family: Arial, Verdana, sans-serif; line-height: 1.75em; box-sizing: border-box !important; word-wrap: break-word !important; background-color: rgb(255, 255, 255);"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">电话：(+86)020-8722 8723 &nbsp; &nbsp;8764 5360 &nbsp; &nbsp;8764 2943 &nbsp; &nbsp;&nbsp;</span></p><p style="text-indent: 0em; white-space: normal; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-size: 12px; font-family: Arial, Verdana, sans-serif; line-height: 1.75em; box-sizing: border-box !important; word-wrap: break-word !important; background-color: rgb(255, 255, 255);"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">传真：020-8722 8623</span></p><p style="text-indent: 0em; white-space: normal; max-width: 100%; min-height: 1em; color: rgb(62, 62, 62); font-size: 12px; font-family: Arial, Verdana, sans-serif; line-height: 1.75em; box-sizing: border-box !important; word-wrap: break-word !important; background-color: rgb(255, 255, 255);"><span style="max-width: 100%; font-size: 14px; box-sizing: border-box !important; word-wrap: break-word !important;">全国统一免费服务热线：400-020-6788</span></p><p style="text-indent: 0em; 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