GE BRIVO325 /CT 特殊故障------artifact

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                    <p><span><span></span></span></p><p><p><img src="image/20201019/1bd08b695d5fd805cb63ee05a2610294_1.jpg" /></p></p><p><span><span></span></span></p><p><audio src="audio/202010/1603070273743.mp3" controls="controls"></audio></p><p><span><br  /></span></p><p><strong><span>时间：2017.3</span></strong></p><p><strong><span>地点：</span><span>介休中医院</span></strong></p><p><strong><span>设备：brivo325</span></strong></p><p><strong><span>一 故障现象</span></strong><span>：做头部CT出现黑色及白色条状伪影 ，一天病人量为20-30，有3-4个会出现这样的伪影，之前对滑环，碳刷，探测器，及collimator进行清理，并做水模及CT值校准，重新装系统 更换显卡后故障依旧。</span></p><p><strong><span>二 故障分析：</span></strong><span>进行 POR测试 及tube rough iso alinmeng测试，（这边做这个需要密码）&nbsp;</span></p><p><span>&nbsp;&nbsp;</span><span>&nbsp;&nbsp;</span><span>&nbsp;</span><span>&nbsp;</span></p><p><p><img src="image/20201019/79ae5cff9834fa83a62fa32c90ae16c4_2.png" /></p></p><p><span>&nbsp;</span></p><p><p><img src="image/20201019/c19f6a61c158ebab045aa29a94ec6670_3.png" /></p></p><p><span></span></p><p><p><img src="image/20201019/4f91803f7cd489a2e5e073726656a949_4.png" /></p></p><p><p><img src="image/20201019/e2af4d8ed7a25d8c0685ff7d5c911fbb_5.png" /></p></p><p><span></span></p><p><p><img src="image/20201019/16b66b10aff743a33a4ff7b5217dd762_6.png" /></p></p><p><p><img src="image/20201019/3b2cb611f8fd7c475e20130d57a4b16a_7.png" /></p></p><p><span></span><span>&nbsp;&nbsp;</span></p><p><p><img src="image/20201019/cd404e3ab049b0b135abc2d1581b3e14_8.png" /></p></p><p><span></span></p><p><p><img src="image/20201019/cb7f1dc529b9765ac6db7acd360a8f9e_9.png" /></p><span>&nbsp;</span></p><p><span>4.牙片测试，</span></p><p><span>5.发现调整好球馆的位置发生变化，重新调整后位置改变了，怀疑球馆有问题，拆下球馆后发现球馆里面有气泡，需要更换球馆，</span></p><p><span>5.1 拆卸旧球馆</span></p><p><span>5.2 装新球馆</span></p><p><span>5.3 调整球馆前后和左右位置</span></p><p><span>5.4 进行POR及ISO位置调整</span></p><p><span>5.5水模及 床退出来 &nbsp; 扫完 &nbsp; &nbsp;把床定位后 归零 &nbsp;做CT值校准</span></p><p><span><span>至今再没有出现伪影</span></span></p><p><strong><span>三 总结</span></strong><span>&nbsp;：<p><img src="image/20201019/d1b145842e9b731a66eef0ee6fc33497_10.jpg" /></p><p><img src="image/20201019/d1b145842e9b731a66eef0ee6fc33497_10.jpg" /></p><p><img src="image/20201019/d1b145842e9b731a66eef0ee6fc33497_10.jpg" /></p><p><img src="image/20201019/d1b145842e9b731a66eef0ee6fc33497_10.jpg" /></p><p><img src="image/20201019/d1b145842e9b731a66eef0ee6fc33497_10.jpg" /></p><p><img src="image/20201019/d1b145842e9b731a66eef0ee6fc33497_10.jpg" /></p><p><img src="image/20201019/d1b145842e9b731a66eef0ee6fc33497_10.jpg" /></p></span></p><p><span><br  /></span></p><p><span><br  /></span></p><p><p><img src="image/20201019/7822a4e2249e86a45760fbbfc1675e38_17.gif" /></p></p><p><br  /></p>