超声三维探头图像缺失疑似故障排除

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                    <p style="line-height: 1.75em;"><img src="http://mmbiz.qpic.cn/mmbiz/kFiaamOEjRian1HH0R0eUOoCeBLcQMwLwP8AhIKEgibEZWZ6Aj8JI7ctB2SCxKLuXUNfMEVnjyjE28FWL7b7WmoKQ/0" data-ratio="0.11857707509881422" data-w="" src="http://mmbiz.qpic.cn/mmbiz/kFiaamOEjRian1HH0R0eUOoCeBLcQMwLwP8AhIKEgibEZWZ6Aj8JI7ctB2SCxKLuXUNfMEVnjyjE28FWL7b7WmoKQ/0?tp=webp" style=""  /><img data-s="300,640" src="http://mmbiz.qpic.cn/mmbiz/A1DicCH9Vl6No8N0MEwEdfgPjywu9zIHbMyibNc5C3d2vI2fKOZjOnaDZVVaZPo2stVPjSxkNnYsyjpaPsJt8lfg/0" data-ratio="0.9389312977099237" data-w="262"  /></p><p style="line-height: 1.75em;">如果您的机器上配备了3D6-2探头或V6-2探头等机械扇扫三维探头，那么您或许会发现过类似如下问题，如图片所示，当选中该探头而又放在探头架上不用时，二维图像近场会出现“暗区”，宽度不定。</p><p style="line-height: 1.75em;">   <img data-s="300,640" src="http://mmbiz.qpic.cn/mmbiz/uSE3CI0L20CRuWyxXJznSF5b3FO5g9oXEzE6eianGqtCMTrwZE5pLvJWlkPk7J9LhDAQYQTDcZC1wcWw680w61w/0" data-ratio="1.0840579710144929" data-w="345" src="http://mmbiz.qpic.cn/mmbiz/uSE3CI0L20CRuWyxXJznSF5b3FO5g9oXEzE6eianGqtCMTrwZE5pLvJWlkPk7J9LhDAQYQTDcZC1wcWw680w61w/640?tp=webp" style="text-align: center; word-wrap: break-word !important; box-sizing: border-box !important; width: auto !important; visibility: visible !important;"  /></p><p style="line-height: 1.75em;">这个时候您可能会觉得这根探头出问题了，回声不完整，可能是探头自身的晶振损坏了。如果您在探头上涂抹耦合剂，开始扫查工作时，您会发现，图像没有任何问题，各个模式也全都正常。但把探头放回探头架上，擦掉耦合剂，静置一段时间后，那个所谓的“暗区”又出来了，这是怎么回事呢？</p><p><br  /></p><p style="line-height: 1.75em;">我们来看看这种探头的内部结构就明白了：</p><p style="line-height: 1.75em;"><img data-s="300,640" src="http://mmbiz.qpic.cn/mmbiz/uSE3CI0L20CRuWyxXJznSF5b3FO5g9oXNiafWUIpRMG7MWaI2PJZIHDiark3zA2LibzA71Up6M6JRgRaYU3xia7VdA/0" data-ratio="0.7650429799426934" data-w="349" src="http://mmbiz.qpic.cn/mmbiz/uSE3CI0L20CRuWyxXJznSF5b3FO5g9oXNiafWUIpRMG7MWaI2PJZIHDiark3zA2LibzA71Up6M6JRgRaYU3xia7VdA/640?tp=webp" style="word-wrap: break-word !important; box-sizing: border-box !important; width: auto !important; visibility: visible !important;"  /></p><p style="line-height: 1.75em;">这种探头是用马达(红色圈标注的部分)来驱动晶振面在一定角度内摆动来进行三维成像的，在马达密封的外壳内，里面注入了负责润滑和降温的液体。</p><p style="line-height: 1.75em;"><img data-s="300,640" src="http://mmbiz.qpic.cn/mmbiz/uSE3CI0L20CRuWyxXJznSF5b3FO5g9oXWOkNFlgY6WNRKukEQhgwnDETeBg577IjC478YpP78TzQZwEyqbppsg/0" data-ratio="0.7522935779816514" data-w="327" src="http://mmbiz.qpic.cn/mmbiz/uSE3CI0L20CRuWyxXJznSF5b3FO5g9oXWOkNFlgY6WNRKukEQhgwnDETeBg577IjC478YpP78TzQZwEyqbppsg/640?tp=webp" style="word-wrap: break-word !important; box-sizing: border-box !important; width: auto !important; visibility: visible !important;"  /></p><p style="line-height: 1.75em;">为保持压力平衡，里面还是存有少量空气的，当探头长时间向上空置时，液体里面的气泡会浮到最上面，从而形成了所谓的“暗区”，在改变探头位置或探头接触到患者体表时，气泡跑到了其他位置，探头一切使用正常。</p><p><br  /></p><p style="line-height: 1.75em;">所以，这是正常的现象，您的探头并没有损坏，不必担心。</p><p style=""><img src="http://mmbiz.qpic.cn/mmbiz/rz7R73cuHRrv6jdOCoJeZmYwvEAIoHpY0a7yJL2egiaEokLTpwkIsIRTzTFUic09aEThKHS4hrEcSqU0lAS3tu5g/0" data-ratio="0.14784394250513347" data-w="487" width="auto" width="auto" src="http://mmbiz.qpic.cn/mmbiz/rz7R73cuHRrv6jdOCoJeZmYwvEAIoHpY0a7yJL2egiaEokLTpwkIsIRTzTFUic09aEThKHS4hrEcSqU0lAS3tu5g/0?tp=webp" style="word-wrap: break-word !important; box-sizing: border-box !important; width: auto !important; visibility: visible !important;"  /></p><p style=""><legend style="padding: 0px; max-width: 100%; word-wrap: break-word !important; box-sizing: border-box !important; white-space: normal; color: rgb(51, 51, 51); font-family: 宋体; font-size: 14px; line-height: 24px; 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