漫说X光、CT、核磁、B超的原理及作用！

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                    <section data-role="paragraph" data-color="rgb(182, 228, 253)" data-custom="rgb(182, 228, 253)"><section><section><section><section powered-by="gulangu"><section><section><section><section powered-by="gulangu"><section><section><section><section powered-by="gulangu"><section><section><section><section powered-by="gulangu"><section><section><section><section><p><p><img src="image/20201014/86b79d371e9862b01189f0252a03b2cd_1.png" /></p></p></section><section><section><span><strong></strong></span></section><p><span>医疗器械媒体报道先锋</span></p><p><span>分享专业医疗器械知识</span></p></section><section><section><section><span>关注</span></section></section></section></section></section></section></section></section></section></section></section></section></section></section></section></section></section></section></section></section></section></section></section><p><br  /></p><section data-role="outer" label="Powered by gulangu"><section data-tools="gulangu" data-id="94325" data-color="#6aa9ad"><section data-width="100%"><section data-width="100%"><section data-autoskip="1"><p><span>到医院看病时</span></p><p><span>医生会开各种各样的检查</span></p><p><span><p><img src="image/20201014/317dd39c42d3af40be30ebba55680891_2.jpg" /></p></span></p><p><span><strong><span>X光拍片</span></strong></span></p><p><span><strong><span>CT</span></strong></span></p><p><span><strong><span>B超</span></strong></span></p><p><span><strong><span>核磁</span></strong></span></p><p><br  /></p><p><p><img src="image/20201014/ecb046ffcfccd239c47623f2c5a7992f_3.jpg" /></p></p><p><br  /></p><p><span>这些最常见的检查</span></p><p><span>是怎么回事？</span></p><p><span>应该怎么选？</span></p><p><span>下面小编详细为大家介绍一下</span></p><p><br  /></p><p><span>↓↓</span></p></section><section data-width="100%"></section></section></section></section><section data-role="paragraph" data-color="#6aa9ad"><p><br  /></p><p><br  /></p></section></section><p><p><img src="image/20201014/69bebc3250eaf82e5966f0137056bafa_4.jpg" /></p></p><section powered-by="gulangu"><br  /></section><section powered-by="gulangu"><span><strong>X射线&nbsp;</strong></span>是一种波长极短，能量很大的电磁波，X射线的波长比可见光的波长更短(约在0.001～10纳米，医学上应用的X射线波长约在0.001～0.1 纳米之间)，它的光子能量比可见光的光子能量大几万至几十万倍 [2] 。由德国物理学家W.K.伦琴于1895年发现，故又称伦琴射线。</section><section powered-by="gulangu"><br  /></section><section data-role="outer" label="Powered by gulangu"><section data-tools="gulangu" data-id="92918" data-color="#757576"><section data-tools="gulangu" data-id="91727" data-color="#757576"><section><section><p><img src="image/20201014/cb3ada58add52d15d84f568f706589d9_5.gif" /></p></section></section></section></section><section data-role="paragraph" data-color="#757576"><p><br  /></p></section></section><p><p><img src="image/20201014/c1d343dacf8487fc229973d4b4943f05_6.jpg" /></p></p><section powered-by="gulangu"><span><strong><span><br  /></span></strong></span></section><section powered-by="gulangu"><span><strong><span>MRI&nbsp;</span></strong></span><span>也就是磁共振成像，英文全称是：Magnetic Resonance Imaging。经常为人们所利用的原子核有：1H、11B、13C、17O、19F、31P。在这项技术诞生之初曾被称为核磁共振成像，到了20世纪80年代初，作为医学新技术的NMR成像（NMR Imaging）一词越来越为公众所熟悉。随着大磁体的安装，有人开始担心字母“N”可能会对磁共振成像的发展产生负面影响。另外，“nuclear”一词还容易使医院工作人员对磁共振室产生另一个核医学科的联想。因此，为了突出这一检查技术不产生电离辐射的优点，同时与使用放射性元素的核医学相区别，放射学家和设备制造商均同意把“核磁共振成像术”简称为“磁共振成像（MRI）”。</span></section><section powered-by="gulangu"><span><br  /></span></section><section data-role="outer" label="Powered by gulangu"><section data-tools="gulangu" data-id="92918" data-color="#757576"><section data-tools="gulangu" data-id="91727" data-color="#757576"><section><section><p><img src="image/20201014/cb3ada58add52d15d84f568f706589d9_5.gif" /></p></section></section></section></section><section data-role="paragraph" data-color="#757576"><p><br  /></p></section></section><p><p><img src="image/20201014/4013882d8ba72f0fb73c87b010fcd8a2_8.jpg" /></p></p><p><br  /></p><p><span><strong><span>B超&nbsp;</span></strong></span><span>人们在说话或唱歌的时候，我们听到的声音称为声波，它的频率在50~10000Hz，超过20000Hz以上的声波，人耳就不能听见，称为超声波，简称超声。超声在诊断疾病时，有多种形式：①以振幅（ amplitude）形式诊断疾病的称“一维显示” , 因振幅第一个英文字母是A，故称A超，又称一维超声。②以灰阶即亮度（brightness）模式形式来诊断疾病的称“二维显示”，因亮度第一个英文字母是B，故称B超，又称二维超声或灰阶超声。</span></p><p><br  /></p><section data-role="outer" label="Powered by gulangu"><section data-tools="gulangu" data-id="92918" data-color="#757576"><section data-tools="gulangu" data-id="91727" data-color="#757576"><section><section><p><img src="image/20201014/cb3ada58add52d15d84f568f706589d9_5.gif" /></p></section></section></section></section></section><p><br  /></p><p><p><img src="image/20201014/dcdd51a3d41730c0d3fe0c9270e75190_10.jpg" /></p></p><section powered-by="gulangu"><span><strong><span><br  /></span></strong></span></section><section powered-by="gulangu"><span><strong><span>CT(Computed Tomography)</span></strong></span><span>，即电子计算机断层扫描，它是利用精确准直的X线束、γ射线、超声波等，与灵敏度极高的探测器一同围绕人体的某一部位作一个接一个的断面扫描，具有扫描时间快，图像清晰等特点，可用于多种疾病的检查；根据所采用的射线不同可分为：X射线CT（X-CT）以及γ射线CT（γ-CT)等。</span></section><section powered-by="gulangu"><span><br  /></span></section><section data-role="outer" label="Powered by gulangu"><section data-tools="gulangu" data-id="92918" data-color="#757576"><section data-tools="gulangu" data-id="91727" data-color="#757576"><section><section><p><img src="image/20201014/cb3ada58add52d15d84f568f706589d9_5.gif" /></p></section></section></section></section><section data-role="paragraph" data-color="#757576"><p><br  /></p></section></section><p><p><img src="image/20201014/31140baa2a0268af83b0624d4dd91f9b_12.jpg" /></p></p><p><span><strong><span><br  /></span></strong></span></p><p><span><strong><span>PET-CT</span></strong></span><span>中文表述：正电子发射计算机断层显像</span></p><p><span>PET-CT将PET与CT完美融为一体，由PET提供病灶详尽的功能与代谢等分子信息，而CT提供病灶的精确解剖定位，一次显像可获得全身各方位的断层图像， 具有灵敏、准确、特异及定位精确等特点，可一目了然的了解全身整体状况，达到早期发现病灶和诊断疾病的目的。PET-CT的出现是医学影像学的又一次革命，受到了医学界的公认和广泛关注，堪称“现代医学高科技之冠”。</span></p><p><span>PET-CT是最高档PET扫描仪和先进螺旋CT设备功能的一体化完美融合，临床主要应用于肿瘤、脑和心脏等领域重大疾病的早期发现和诊断。</span></p><p><span><br  /></span></p><section data-role="outer" label="Powered by gulangu"><section data-tools="gulangu" data-id="92918" data-color="#757576"><section data-tools="gulangu" data-id="91727" data-color="#757576"><section><section><p><img src="image/20201014/cb3ada58add52d15d84f568f706589d9_5.gif" /></p></section></section></section></section></section><section powered-by="gulangu"><br  /></section><section powered-by="gulangu"><p><img src="image/20201014/3656862a063d01332875bce96b450de3_14.jpg" /></p><section></section></section><p><br  /></p><p><span><strong><span><a data-miniprogram-appid="wxdc7efe409d688f37" data-miniprogram-path="pages/authorizationLogin/authorizationLogin" data-miniprogram-nickname="" href="" data-miniprogram-type="image" data-miniprogram-servicetype="" target="_blank" href=""><p><img src="image/20201014/7235eecc5e3d188f5fff3d4fc9e8c241_15.png" /></p></a></span></strong></span></p><p><br  /></p><section data-role="outer" label="Powered by gulangu"><section data-tools="gulangu" data-id="95124" data-color="#6aa9ad" data-custom="#6aa9ad"><section data-width="100%"><section><section><section data-brushtype="text"><strong><span>相关阅读</span></strong></section></section></section><section><section></section></section><section data-width="100%"><section><section><section><section data-width="100%"><section data-tools="gulangu" data-id="87578" data-color="#6aa9ad" data-custom="#59c3f9"><section><p><img src="image/20201014/2aac877ff9233ba5a66e7a5ff3a4febf_16.gif" /></p></section><section data-brushtype="text">戳下文，更有料！</section></section></section><section 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