超声图像干扰原因分类及其处理措施（三）

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                    <section><section powered-by="gulangu"><section><section><p><img src="image/20201019/eefd5c3452f98bdcb7c4f61d94200649_1.gif" /></p></section></section></section><section powered-by="gulangu"><section><section> <section> <section powered-by="gulangu"><section><section><p>干扰分类---</p><p>外部干扰，关闭干扰源或远离干扰源</p></section></section></section> </section> </section></section></section><section powered-by="gulangu"><section><section><p>9、DC-6</p></section></section></section><section powered-by="gulangu"><section><section><p><img src="image/20201019/1824229c3528410e6b060abbbdd53075_2.jpg" /></p></section></section></section><section powered-by="gulangu"><section><section><p>现象： 二维图像远场有明显的波纹状干扰。</p><p>原因： PC工作台通过S-video端子线和DC-6共地后引入的干扰 。</p><p>解决措施：最后让工程师将采集卡的挡片和PC机箱的外壳用纸片垫起，隔离，干扰有明显减小，但无</p><p>法完全消失，让医院将就使用，继续观察。</p><p>10、 DC-6</p></section></section></section><section powered-by="gulangu"><section><section><p><img src="image/20201019/d83e6a797f4468f37f9aea2f8cf303dc_3.jpg" /></p></section></section></section><section powered-by="gulangu"><section><section><p>现象： 彩色取样框内有斑点状、波纹状干扰。</p><p>原因： 保护地线不规范所致。</p><p>解决措施：医院做专用地线，故障解决。</p><p>11、DC-6</p></section></section></section><section powered-by="gulangu"><section><section><p><img src="image/20201019/2a078bbbb34c0d527759b86528b92731_4.jpg" /></p></section></section></section><section powered-by="gulangu"><section><section><p>现象：腹部探头（3C5A改进I型）在谐波H4.5M和H5.0M下远场有波纹状干扰，在普通频率下没有干扰。其它探头正常。</p><p>原因：国际知名品牌超声机器本身有干扰问题，为了解决该问题，其工程师用不标准的两芯电源线，但是他的机器会带电，为了解决带电问题，又通过接地线将其机器接到迈瑞机器上，给迈瑞的机器带来干扰。</p><p>解决方案：去掉连接在迈瑞机器上的接地线。</p><p>12、DC-6</p></section></section></section><section powered-by="gulangu"><section><section><p><img src="image/20201019/8a0390625ae89e8d9a7791288997fa10_5.jpg" /></p></section></section></section><section powered-by="gulangu"><section><section><p>现象：腹部探头二维图像及彩色血液均有间歇性干扰，每次出现时间10-15S不等，发生间隔时间不定。</p><p>原因：电梯和超声设备共电网所致。</p><p>&nbsp;&nbsp; 解决措施：超声与电梯不共电网。</p><p>13、P4-2探头干扰</p></section></section></section><section powered-by="gulangu"><section><section><p><img src="image/20201019/27ee0ae8761d23bd492972d9c275d2ea_6.jpg" /></p></section></section></section><section powered-by="gulangu"><section><section><p>现象：探头接触病人或用手接触探头彩色图像会出现如上图一样的干扰</p><p>原因分析：电网中有干扰信号，通过主机、探头、人体、大地的路径形成干扰回路，产生干扰的原因是干扰信号经过了探头</p><p>解决方案：通过等电位接地线将机器连接到病床上，使干扰通过接地线、病床流回大地，不在经过探头。</p><p>14、DP-5偶发图像干扰</p></section></section></section><section powered-by="gulangu"><section><section><p><img src="image/20201019/164e6424e88aa9bfc1142e55b71097a9_7.jpg" /></p></section></section></section><section powered-by="gulangu"><section><section><p>现象：远场出现水波状干扰，出现时间没有规律性，不定期，并且每次出现时间长短也不规律。</p><p>原因分析：机器移到距离本科室最远的一个科室，开机后并未发现干扰现象，进行反复实验，防止偶发图像正常的现象。最后发现机器在原来科室时有干扰现象，而在最远科室图像正常，由此判断设备正常，为外部干扰原因。</p><p>解决方案：</p><p>走访各个科室，调查是否有设备的开机使用时间与出现干扰的时间相吻合，最后调查出中医诊疗科（距离DP-5约有10m，间隔2个房间）内的一台微波热疗仪的开机使用时间比较吻合，当调节到最大输出的时候会对超声形成干扰现象。出现干扰现象的图像与之前的吻合。</p><p>干扰源确认成功。</p><p>15、综合干扰</p></section></section></section><section powered-by="gulangu"><section><section><p><img src="image/20201019/f1259458ce899f9ea1a605b8896cd6c6_8.jpg" /></p></section></section></section><section powered-by="gulangu"><section><section><p>现象：回声区出现波纹状干扰</p><p>原因分析：共有3个干扰源：市电环境、UPS劣质电池组和工作站杂牌电脑主机电源盒</p><p>解决方案：分别通过采取独立接地，更换UPS以及电脑电源盒，问题解决。</p><p><br  /></p></section></section></section><section powered-by="gulangu"><section><section> <section powered-by="gulangu"><section><section><p>欢</p></section></section></section> </section><section> <section powered-by="gulangu"><section><section><p>迎</p></section></section></section> </section><section> <section powered-by="gulangu"><section><section><p>关</p></section></section></section> </section><section> <section powered-by="gulangu"><section><section><p>注</p></section></section></section> </section></section></section><section powered-by="gulangu"><section><section><p><br  /></p></section></section></section><section powered-by="gulangu"><section><section> <section powered-by="gulangu"><section><section><p><img src="image/20201019/2c8e79969a304854869c149d7a250206_9.jpg" /></p></section></section></section> </section><section> <section powered-by="gulangu"><section><section> </section></section></section> </section><section> <section powered-by="gulangu"><section><section><p>关注我们</p><p>一起涨姿势！</p></section></section></section> </section></section></section></section>