超声设备工作受干扰？常见故障和排查方法 | 技术支持

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<section><section powered-by="gulangu"><section><section><section></section></section><section><section powered-by="gulangu"><section><section><p><span>由于超声设备探头的高灵敏度以及整机电路的宽频带等特点，在使用过程中，超声设备极易受到各种电源或电磁场的干扰，对医院日常诊断工作造成很大影响。</span></p><p><span><br  /></span></p><p><span>常见的外部干扰引入超声设备的途径不外乎以下两种：一是从探头、屏蔽不良的线缆、接头，机壳等引入，二是通过电网引入。</span></p></section></section></section></section></section></section></section><p><span></span>&nbsp;以下用具体的案例展示常见的一些干扰，供大家参考：<br  /></p><p><br  /></p><section label="Copyright ? 2016 playhudong All Rights Reserved." donone="shifuMouseDownPayStyle(&#39;shifu_prs_001&#39;)"><section><section><p><img src="image/20201019/e8ade78425625fe54e4a944c2fc68522_1.png" /></p></section></section><section><strong></strong><strong></strong><p><span>C模式取样框内彩色干扰</span></p></section><section><p><span>干扰原因：本案例中是由于探头线缆屏蔽层断裂，干扰电磁场引入导致。</span></p></section></section><p><br  /></p><p><br  /></p><section label="Copyright ? 2016 playhudong All Rights Reserved." donone="shifuMouseDownPayStyle(&#39;shifu_prs_001&#39;)"><section><section><p><img src="image/20201019/994e952ab551803d87df76fe4a4e00f0_2.png" /></p></section></section><section><strong></strong><strong></strong><p><span>扇区内中远场白色点状干扰</span></p></section><section><p><span>干扰原因： 本案例中是由于房间内的日光灯导致。</span></p></section></section><p><br  /></p><p><br  /></p><section label="Copyright ? 2016 playhudong All Rights Reserved." donone="shifuMouseDownPayStyle(&#39;shifu_prs_001&#39;)"><section><section><p><img src="image/20201019/5d5f1fdbc7478474a2d9a0be98650da2_3.png" /></p></section></section><section><strong></strong><strong></strong><p><span>远场规则的弧形波纹状干扰</span></p></section><section><p><span>干扰原因： 本案例中是由于电动车充电器导致。</span></p></section></section><p><br  /></p><p><br  /></p><section label="Copyright ? 2016 playhudong All Rights Reserved." donone="shifuMouseDownPayStyle(&#39;shifu_prs_001&#39;)"><section><section><p><img src="image/20201019/83390408d1df8c0c674c67031fafa246_4.png" /></p></section></section><section><strong></strong><strong></strong><p><span>二维扇形区远场放射状干扰</span></p></section><section><p><span>干扰原因： 本案例中是由于医院中医诊疗科一台微波热疗仪开机后调到最大输出时通过电网引入干扰导致。</span></p></section></section><p><br  /></p><p><br  /></p><section label="Copyright ? 2016 playhudong All Rights Reserved." donone="shifuMouseDownPayStyle(&#39;shifu_prs_001&#39;)"><section><section><p><img src="image/20201019/08b75a8c0f9fef9feaab1f9a02f6b525_5.png" /></p></section></section><section><strong></strong><strong></strong><p><span>远场弧形水波纹状干扰</span></p></section><section><p><span>干扰原因： 本案例中是接地线不规范导致（医院将底线接在了暖气管上）。</span></p></section></section><p><br  /></p><p><br  /></p><section label="Copyright ? 2016 playhudong All Rights Reserved." donone="shifuMouseDownPayStyle(&#39;shifu_prs_001&#39;)"><section><section><p><img src="image/20201019/45edd96a37650c41505fa5cc2e71cfd4_6.png" /></p></section></section><section><strong></strong><strong></strong><p><span>远场间歇性弧形干扰</span></p></section><section><p><span>干扰原因： 本案例中是电梯与超声设备共用电网导致。</span></p></section></section><section donone="shifuMouseDownCard(&#39;shifu_c_010&#39;)"><section><p><span>以上列举了一些常见的干扰。除此之外，还有医院科室的电源、工作站电脑、电视机、身份证阅读器等也会导致干扰。一般而言，外部干扰导致的图像问题有以下特征：</span></p><p><span><span>◆</span>发生在特定探头，一般腹部或浅表探头较常见</span></p><p><span><span>◆</span>谐波下明显，有些干扰不开谐波时不会出现</span></p><p><span><span>◆</span>一般出现在图像的中远场区域，近场不明显<br  /><span>◆</span>干扰一般都是间歇性出现</span></p></section></section><section donone="shifuMouseDownCard(&#39;shifu_c_029&#39;)" label="Copyright Reserved by PLAYHUDONG."><section><span><span>排查干扰源</span></span></section><section><section><section><p><span><span></span>拔掉与超声设备共用同一插座的其它用电器，使超声设备单独使用插座供电。</span></p><p><span><span></span>将超声设备移动到其它房间观察使用。</span></p><p><span><span></span>观察超声设备发生干扰时医院其它用电设备的使用情况（如是否有设备在同一时间开机等）。</span></p><p><span><span></span>如果有电池供电，可以使用电池电源观察干扰是否改善。</span></p><p><span><span></span>尝试加装合格的地线。</span></p></section></section></section></section><p><br  /></p><section><section powered-by="gulangu"><section><section><section powered-by="gulangu"><section><section><section>【文章来源】迈瑞医学影像全球技术支持部</section></section></section></section></section></section></section><section powered-by="gulangu"><section><section><section><section><section><section></section></section></section></section></section></section></section></section><p><br  /></p><p><p><img src="image/20201019/1ddcbb45b13c502ad456f2f131cf04b4_7.png" /></p></p>