为什么MRI检查比CT贵？

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                    <section><section powered-by="gulangu"><section><section><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>医疗器械第一新媒体</span></p><p><span>分享专业医疗器械知识</span></p></section><section><section><section>关注</section></section></section></section></section></section></section></section></section></section></section></section></section></section></section></section></section></section></section></section></section></section></section><p><strong><span>来源：知乎</span></strong></p><p><br  /></p><p><span>为什么MRI比CT检测费贵？究竟有哪些因素影响了这些影像检查的价格呢？请看下文详解。</span></p></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><section powered-by="gulangu"><section><section><section powered-by="gulangu"><section><section><p><strong>购买成本</strong></p></section></section></section></section></section></section></section></section></section></section></section></section><section powered-by="gulangu"><section><section><p><br  /></p></section></section></section><section powered-by="gulangu"><section><section><p>MRI分为低场永磁（&lt;1T）、1.5T超导、3T超导，（T是特斯拉，磁场强度单位），这三者成本分别大概在200~800W、500~1800W、1500~3000W，除去购买机器本身的成本，每台MRI安装都需要取得卫生厅颁发的机器配置证，这三类MRI获得配置证的难度递增，尤其是3T超导MRI，一般二级城市也就一两台。卫生部规定的收费标准这三者单价是都差不太多。</p><p><br  /></p><p>CT分为单排、双排、4排、16排、64排和超高端128排，成本从几十万到两三千万不等，64排CT和1.5T超导MRI价钱差不多，超高端CT和3T超导MRI价钱差不多，同样由于配置证的限制，超高端CT和3T超导MRI一样稀少。但单排双排的CT配置证取得非常容易（有些地区甚至不需要配置证），所以大多数地县级医院都购买价钱便宜又配置证难度低的单排、双排的CT来做检查，成本自然比MRI低很多。</p><p><br  /></p><p><strong>在安装成本上MRI设备和CT设备也是有一定的区别的。</strong></p><p><br  /></p></section></section></section><section powered-by="gulangu"><section><section><section powered-by="gulangu"><section><section><section powered-by="gulangu"><section><section><section powered-by="gulangu"><section><section><p><strong>如何屏蔽</strong></p></section></section></section></section></section></section></section></section></section></section></section></section><section powered-by="gulangu"><section><section><p><br  /></p></section></section></section><section powered-by="gulangu"><section><section><p>MRI设备安装前要做屏蔽，一般屏蔽材料是用铜板，主要是屏蔽信号，不是屏蔽辐射，MRI基本没有辐射，做屏蔽是为了保证设备间内的磁场和射频信号的稳定纯净不受外界干扰（碰到过有些医院的核磁间就在电梯旁边，需要做的屏蔽工作要比常规的多一倍），CT的屏蔽防护是要屏蔽辐射，来保护医护人员和屋外的患者免受辐射，CT一般是用达到一定铅当量的混凝土或砖来做屏蔽。<br  /></p><p><br  /></p></section></section></section><section powered-by="gulangu"><section><section><section powered-by="gulangu"><section><section><section powered-by="gulangu"><section><section><section powered-by="gulangu"><section><section><p><strong>安装成本</strong></p></section></section></section></section></section></section></section></section></section></section></section></section><section powered-by="gulangu"><section><section><p><br  /></p><p>MRI设备里面装的是液氦，而且从其工作原理上也对安装的稳定性要求很高，这就加大了安装的难度，而且一般来说，MRI比CT重很多，进场的时候有时需要在经过的路上加垫很多钢板木板以保护地面不会被压坏。</p><p><br  /></p></section></section></section><section powered-by="gulangu"><section><section><section powered-by="gulangu"><section><section><section powered-by="gulangu"><section><section><section powered-by="gulangu"><section><section><p><strong>运营成本</strong></p></section></section></section></section></section></section></section></section></section></section></section></section><section powered-by="gulangu"><section><section><p><br  /></p></section></section></section><section powered-by="gulangu"><section><section><p>超导MRI的一大运营成本是液氦，液氦是用来冷却磁体线圈以使其维持在超导状态，液氦属于战略物资，便宜的时候200块/升，贵的时候600块/升，一般西门子和GE的机器要4年一充，飞利浦大概一两年一充，每次填充至少500升，这成本你可以算一下。全球大部分液氦的控制权在老美手里，所以据说是GE这样的美国公司拿液氦会比国内厂商甚至其他国外厂商更容易些。MRI的另一大运营成本是冷头，冷头也是用来冷却液氦以维持磁体超导状态，但冷头属于耗材，基本上一般3、4年一换，一个冷头就要几十万。<br  /></p><p><br  /></p><p>CT的最大运营成本是球管，球管是用来产生和发射X射线的，这个比 MRI的冷头还耗，用得好一两年一换，人品差的或使用过度的一年就要换好几个，成本也要几十万将近100W。不过除此之外但就机器而言CT基本没有其他的运营成本。</p><p><br  /></p></section></section></section><section powered-by="gulangu"><section><section><section powered-by="gulangu"><section><section><section powered-by="gulangu"><section><section><section powered-by="gulangu"><section><section><p><strong>经济效益</strong></p></section></section></section></section></section></section></section></section></section></section></section></section><section powered-by="gulangu"><section><section><p><br  /></p></section></section></section><section powered-by="gulangu"><section><section><p>MRI在特定部位的成像要远优于CT，尤其是一些软组织，但MRI的扫描时间很久，平均一个患者检查至少要十多分钟，CT检查要快很多，所以本身购买成本高运营成本高的MRI单次检查成本也就比CT高了。<br  /><br  /></p><p>由于MRI无辐射无创检查，在国外已经超过CT成为最常规的检查手段，我国目前还是以CT做为主要影像检查，MRI对很多人来说算是高端货，这也一方面地推高了MRI收费价格。</p><p><br  /></p><p><span>（本文来源：知乎）</span></p></section></section></section></section><p><br  /></p><p><strong><span><p><img src="image/20201014/136b953773c607f1be62c7b002beb7ef_2.jpg" /></p></span></strong></p><section data-id="1658"><section><section><section data-id="1658"><section><section><section data-id="1658"><section><section><section data-id="1658"><section><section><p><span><strong>相关阅读</strong></span></p></section><p><p><img 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