长长的图|用一根香蕉的辐射量来衡量医学影像检查

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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：</span></strong></p><p><br  /></p><p>身为圈外人的你，是否谈到“辐射”就脸色都变了？身为医疗器械从业人员的你，是否常常头痛不知如何向别人解释辐射的概念？身为患者的你，是否对遭受辐射的后果忧心忡忡，无比恐慌？<br  /></p><p><br  /></p><p><span>核物理学界在讲剂量时喜欢拿香蕉说事：香蕉等效剂量。</span>快看看这张长图，以上问题都会变成庸人自扰~</p><p><br  /></p><p><p><img src="image/20201014/6bb3a53eccf54cf7701d63f00f603714_2.jpg" /></p></p><p><strong>背景知识点：</strong>&nbsp;</p><p><br  /></p><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><img src="image/20201014/e70bf3001bc71e04aa55bdcb4329cb14_3.png" /></p></section></section></section><section powered-by="gulangu"><section><section><p><img src="image/20201014/e70bf3001bc71e04aa55bdcb4329cb14_3.png" /></p></section></section></section></section></section></section></section><section><section powered-by="gulangu"><section><section><p><strong>香蕉等效剂量</strong><br  /></p></section></section></section><section powered-by="gulangu"><section><section></section></section></section></section></section></section><section powered-by="gulangu"><section><section><section powered-by="gulangu"><section><section><p>香蕉富含K元素，K的放射性同位素K40的半衰期长达90年。100g含360mg钾元素，一根香蕉约含0.5g k元素。换算成放射性活度就是，每秒钟有约15个k40原子发生衰变。这就是香蕉等效剂量。每吃一根香蕉会让你增加 0.078 μSv 剂量的内照射。</p></section></section></section></section></section></section></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><img src="image/20201014/e70bf3001bc71e04aa55bdcb4329cb14_3.png" /></p></section></section></section><section powered-by="gulangu"><section><section><p><img src="image/20201014/e70bf3001bc71e04aa55bdcb4329cb14_3.png" /></p></section></section></section></section></section></section></section><section><section powered-by="gulangu"><section><section><p><strong>电离辐射</strong></p></section></section></section><section powered-by="gulangu"><section><section></section></section></section></section></section></section><section powered-by="gulangu"><section><section><section powered-by="gulangu"><section><section><p>所谓电离辐射，顾名思义是指能够使物质发生电离的辐射。电离辐射通常可分为两类，一类为高频率的电磁波，如X射线、γ射线；另一类为高能粒子束，如α、β 粒子或中子束等。</p></section></section></section></section></section></section></section></section></section><section powered-by="gulangu"><section><section><p><br  /></p></section></section></section></section><p>引发电离辐射的放射性物质是人类居住环境的组成部分，日常生活中的电离辐射41%来自石头、泥土及建筑材料中的放射性气体；28%来自岩石、土壤中的放射性物质；15%来自X射线等医疗辐射；9%来自食物和饮料中的天然放射性核素；6%来自宇宙射线；1%来自高空飞行等。天然辐射源所致平均辐射剂量就世界范围来看，每人每年大约为2.4mSv。</p><p>&nbsp;</p><p>而我们所关心的“电离辐射危害”指的是人们在利用射线和核能时受到超过一定剂量的电离辐射而造成的健康影响。日常医疗照射剂量的电离辐射在安全范围内，但我们依然要提高警惕，避免无意义的暴露。</p><p>&nbsp;</p><p>下次去医院检查别再被“吃射线”吓坏哦！</p><p><br  /></p><p><strong><span>本文由整理原创，转载请注明出处。</span></strong></p><p><br  /></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 src="image/20201014/ec237188ae1e9c03eb4d9814f31b18ab_7.gif" /></p></p><p><span>科普动画|MRI、CT、PET分别是怎么扫描图像的？</span><br  /></p><p><br  /></p><p><span>为什么多层螺旋CT能风靡世界20年？</span><br  /></p><p><br  /></p><p><span>同为64排CT，为什么“它”叫128层，“你”却是64层？</span><br  /></p><p><br  /></p><p><span>医疗器械唯一标识（UDI）为什么如此重要？</span><br  /></p></section></section></section></section></section></section></section></section></section></section><br  /></section><p><br  /></p><p><p><img src="image/20201014/225eae26a91575de7508aebe3e999278_8.jpg" /></p></p>