CT辐射大吗？会致癌吗？体检要不要做CT？

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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><span>&nbsp;</span></p><p><br  /></p><section powered-by="gulangu"><section><section><section powered-by="gulangu"><section><section><p>单位组织体检让我做了个CT，我现在很担心，会不会危害很大？听说CT辐射会致癌……</p></section></section></section></section></section></section><section powered-by="gulangu"><section><section><p><br  /></p><p>CT辐射大吗？</p><p><br  /></p><p>会致癌吗？</p><p><br  /></p><p>体检要不要做CT？</p><p><br  /></p><p>做CT需要注意啥？</p></section></section></section><section powered-by="gulangu"><section><section><section powered-by="gulangu"><section><section><section powered-by="gulangu"><section><section><p><br  /></p></section></section></section></section></section></section><section powered-by="gulangu"><section><section><p>又到体检时节，朋友们都在讨论：正常人体检到底能不能做CT?会不会被辐射致癌？<span>事实上，CT等辐射检查作为必要的医疗手段，机器的辐射量是固定的，并<span><strong>不会</strong></span>对健康造成显著影响。</span></p></section></section></section><section powered-by="gulangu"><section><section><section powered-by="gulangu"><section><section><p><br  /></p></section></section></section></section></section></section></section></section></section><section powered-by="gulangu"><section><section><section><section></section></section><section><p><br  /></p></section><section><section></section></section></section></section></section><section powered-by="gulangu"><section><section><section powered-by="gulangu"><section><section><p>低剂量螺旋CT</p></section></section></section><section powered-by="gulangu"><section><section><section powered-by="gulangu"><section><section><p>是什么？<br  /></p></section></section></section></section></section></section></section></section></section><section powered-by="gulangu"><section><section><p><br  /></p><p>低剂量螺旋CT是指基于能够检测到肺部小结节的最低扫描范围和放射浓度的CT检查技术（也就是用很小的X线剂量达到同样的效果）。</p><p><br  /></p></section></section></section><section powered-by="gulangu"><section><section><p><img src="image/20201014/0497c3c835687de2ad8d274b19191254_2.jpg" /></p></section></section></section><section powered-by="gulangu"><section><section><p><br  /></p><p>螺旋CT扫描是目前临床上用于健康体检中筛查疾病的有效诊断方法之一，&nbsp;可以通过获得比较清晰的图像来进行疾病的早期诊断，&nbsp;有利于患者发现早期病变，&nbsp;避免患者病情加重，&nbsp;延误最佳治疗时间。2011年，美国国家肺癌筛查试验（National LungScreening Trial, NLST）结果表明，低剂量螺旋CT（Low-dose computedtomography, LDCT）可降低20%的肺癌死亡率。</p><p><br  /></p><p>在胸部健康体检中行低剂量螺旋CT，可以在满足诊断要求的同时减少体检者的辐射照射剂量，&nbsp;及时发现早期病变，及时给予对症治疗，&nbsp;预防疾病发生、提高身体健康。</p><p><br  /></p></section></section></section><section powered-by="gulangu"><section><section><section><section></section></section><section><p><br  /></p></section><section><section></section></section></section></section></section><section powered-by="gulangu"><section><section><section powered-by="gulangu"><section><section><p>CT辐射</p></section></section></section><section powered-by="gulangu"><section><section><section powered-by="gulangu"><section><section><p>有多大？<br  /></p></section></section></section></section></section></section></section></section></section><section powered-by="gulangu"><section><section><p>事实上辐射在我们身边到处都是！</p><p><br  /></p><p>CT的辐射有多大，通过以下例子可以理解：</p><p><br  /></p><p>乘坐飞机20小时的剂量0.1mSv，胸片一次剂量大约为0.2mSv，低剂量CT扫描一次剂量大约为：0.1~0.2mSv。普通人暴露在空气中，一年的辐射就达到0.3~0.5个mSv。</p><p><br  /></p></section></section></section><section powered-by="gulangu"><section><section><p><img src="image/20201014/59e48fcb10897f6858261f9c33bf2440_3.jpg" /></p></section></section></section><section powered-by="gulangu"><section><section><p><br  /></p><p>因任何工作和生活引起的辐射建议的剂量限值为每年为1mSv。因此可以说<strong>短期内过多</strong>的CT检查才会给人体带来一定的影响。</p><p><br  /></p></section></section></section><section powered-by="gulangu"><section><section><section><section></section></section><section><p><br  /></p></section><section><section></section></section></section></section></section><section powered-by="gulangu"><section><section><section powered-by="gulangu"><section><section><p>哪些人群属于高危人群</p></section></section></section><section powered-by="gulangu"><section><section><section powered-by="gulangu"><section><section><p>需要定时做胸部放射检查呢？</p></section></section></section></section></section></section></section></section></section><section powered-by="gulangu"><section><section><p>高危人群包括：</p><p><br  /></p><p>（1）年龄50～75&nbsp;岁。</p><p><br  /></p><p>（2）至少合并以下一项危险因素：</p><p><br  /></p><p>&nbsp; ①吸烟≥20包／&nbsp;年，&nbsp;其中也包括曾经吸烟，&nbsp;但戒烟时间不足15年者；</p><p>&nbsp; ②长期被动吸烟者；</p><p>&nbsp; ③有职业暴露史（石棉、铍、铀、氡等接触者）；</p><p>&nbsp; ④有恶性肿瘤病史或肺癌家族史；</p><p>&nbsp; ⑤有COPD&nbsp;或弥漫性肺纤维化病史。</p><p><br  /></p></section></section></section><section powered-by="gulangu"><section><section><p><img src="image/20201014/e8d1ad04e0c539a082ae0edf72e378c9_4.gif" /></p></section></section></section><section powered-by="gulangu"><section><section><section powered-by="gulangu"><section><section><p><span><strong>做胸部CT的话，应该注意什么呢？</strong></span></p><p><br  /></p><p>1．做CT的时候不要携带金属配件</p><p>去除金属之类的物品，比如说耳环、项链、含金属的衣物、手机、&nbsp;钱包和钥匙等，以防对人体造成其他的伤害。</p><p><br  /></p><p>2．主动配合医生</p><p>候检时，避免乱触碰设备，造成不必要的射线曝光。在做CT的时候，按医护人员要求摆好姿势，保持不动，直到听到医护人员说检查完毕。如在检查过程中发生意外或不适，应及时告诉医护人员。</p><p><br  /></p><p>3.&nbsp; 保护非检部位</p><p>可以在放射检查时主动要求对非检部位进行放射防护，尤其是敏感部位(如性腺、甲状腺、眼睛等)</p><p><br  /></p><p>4. CT检查后饮食</p><p>可多食富含维生素A 、C、&nbsp;E的食物，如鲜枣、猕猴桃、柚子、胡萝卜、油菜和花椰菜类。并可食用海带等富含胶质食物，注意多饮水。</p><p><br  /></p></section></section></section></section></section></section><section powered-by="gulangu"><section><section><section powered-by="gulangu"><section><section><p><span><strong>另外需要注意的是</strong></span><strong><span>：</span></strong>由于CT检测有一定的辐射量，因此孕妇以及有严重器官功能衰竭(如心、肝、肾等)的朋友应慎重。</p></section></section></section></section></section></section><section powered-by="gulangu"><section><section><p><strong>摘自“复旦中山呼吸内科—肺腑之言”微信公众号</strong></p></section></section></section><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_5.gif" /></p></p><p><span></span></p><p><span>了解PET、SPETCT、CT的区别，看这篇就够了</span></p><p><br  /></p><p><span>一名癌症放疗病人火化后，火葬场竟然受到了辐射污染……</span></p><p><br  /></p><p><span>关于CT扫查的辐射剂量，国家新出台了参考标准！</span></p><p><br  /></p><p><span>83天活体腐烂！——被核辐射才是最痛苦的死亡方式！</span></p></section></section></section></section></section></section></section></section></section></section></section><p><br  /></p><p><strong><span><strong><span><p><img src="image/20201014/cd6e6da350853c459044672a7cf353fb_6.jpg" /></p></span></strong></span></strong></p>