x光跟CT哪个辐射大

来自湛永滋医生的专业解答，快打开看看是否又获得了新的知识点～

https://m.baidu.com/bd_page_type=1/t=mip/tc?ct=54&lid=23644358122215&module=mip&cst=91&clk_extra=%7B%22pageid%22%3A%2223644358122215%22%2C%22searchID%22%3A%2223644358122215%22%2C%22nPageID%22%3A%2223644358122215%22%2C%22mip_logid%22%3A%2223644358122215%22%2C%22masterpage_type%22%3A%22self%22%2C%22originalUrl%22%3A%22https%3A%5C%2F%5C%2Fm.jkzl.com%5C%2Fdoctor%5C%2Fmip%5C%2Fmip_question.html%3FquestionId%3D4463983%22%2C%22srcid%22%3A%22landingpage%22%2C%22name%22%3A%22A%5Cu533a%5Cu6b63%5Cu6587%5Cu6298%5Cu53e0%22%2C%22id%22%3A%22expand_content%22%7D&tcreq4log=1

https://m.baidu.com/bd_page_type=1/t=mip/tc?ct=54&lid=23644358122215&module=mip&cst=112&clk_extra=%7B%22pageid%22%3A%2223644358122215%22%2C%22searchID%22%3A%2223644358122215%22%2C%22nPageID%22%3A%2223644358122215%22%2C%22mip_logid%22%3A%2223644358122215%22%2C%22masterpage_type%22%3A%22self%22%2C%22originalUrl%22%3A%22https%3A%5C%2F%5C%2Fm.jkzl.com%5C%2Fdoctor%5C%2Fmip%5C%2Fmip_question.html%3FquestionId%3D4463983%22%2C%22srcid%22%3A%22landingpage%22%2C%22name%22%3A%22A%5Cu533a%5Cu6b63%5Cu6587%5Cu4e0b%5Cu65b9%5Cu4e2d%5Cu95f4%5Cu5c55%5Cu5f00%5Cu6309%5Cu94ae%22%2C%22id%22%3A%22new_expand_content%22%7D&tcreq4log=1

健康之路

病情分析：CT的辐射肯定是比X光要大的。CT是要围绕人体做多层断面扫描，而X光只拍摄一个部位，只曝光一次。它是三维体积重叠于二维图像。做一次CT所受的辐射剂量相当于拍很多次X光所受的辐射剂量。

湛永滋

主任医师

提示：本内容仅作参考，不能代替面诊，如有不适请尽快线下就医

问题描述：我朋友想去医院检查身体，想做X光或者CT，X光和CT相比较，哪个辐射更大？