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美国阿尔贡能源部国家实验室的研究人员发明了一种检查煤肺病、肺气肿以及相类似的呼吸系统疾病的新方法。尽管应用的是放射性气体,但该法安全,而且比X线检查灵敏得多。检查时,患者仅吸入少量含有放射性氪的气体。放射性氪为一种惰性气体,其半衰期为13秒。氪原子在衰变时,能够放出一种γ射线,并能在视频管上显示出来。患者所受的照
Researchers at the Argonne National Laboratory in Argonne have invented a new method to check for pneumoconiosis, emphysema and similar respiratory diseases. Although radioactive gas is used, the method is safe and much more sensitive than X-ray examination. At the time of examination, the patient inhaled only a small amount of gas containing radioactive krypton. Radioactive krypton is an inert gas with a half-life of 13 seconds. When the krypton atom decays, it emits a gamma ray and can be displayed on the video tube. According to the patient’s photo