With advanced imaging and computing technologies , a three dimensional picture or animation can be generated to facilitate the diagnostic treatment if radioisotopes are injected or ingested into the patient 运用现时先进的造影技术及电脑科技，只要我们将放射性同位素注入或进食入病人体内，就可以产生立体或动态的影像，从而研究病人的情况。
With advanced imaging and computing technologies , a three dimensional picture or animation can be generated to facilitate the diagnostic treatment if radioisotopes are injected or ingested into the patient 运用现时先进的造影技术及电脑科技，只要我们将放射性同位素注入或进食入病人体内，就可以产生立体或动态的影像，从而研究病人的情况。
So far , tgs is already a matured technology abroad with various types of tgs setups for determining radioisotopes in the samples with medium - and high - density heterogeneous drummed scraps and wastes 到目前为止，国外tgs技术已基本成熟，而且已研制生产出各种类型的tgs仪器，成功应用于中、高密度非均匀样品放射性核素及其含量的准确测量分析。
Most of earth ' s internal heat is generated by four long - lived radioisotopes ? potassium 40 , thorium 232 , uranium 235 and uranium 238 ? that release energy over billions of years as they decay into stable isotopes 地球内部的热能主要来自半衰期较长的四种放射性同位素钾40 、钍232 、铀235与铀238 ，它们在几十亿年来逐渐衰变成稳定的同位素，同时释放能量。
Rays during radioactive decay . while giving the patient a very low radiation dose , technetium - 99m allows sufficient time for the diagnosis process . in therapy treatments , a radioisotope of iodine , iodine - 131 , is used to treat thyroid cancer 在治疗方面，放射性同位素碘- 131用于医治甲状线癌在治疗某几种癌症时，亦会利用钴- 60所放出的射线，射入人体内，将癌细胞杀死。
Rays during radioactive decay . while giving the patient a very low radiation dose , technetium - 99m allows sufficient time for the diagnosis process . in therapy treatments , a radioisotope of iodine , iodine - 131 , is used to treat thyroid cancer 在治疗方面，放射性同位素碘- 131用于医治甲状线癌；在治疗某几种癌症时，亦会利用钴- 60所放出的射线，射入人体内，将癌细胞杀死。
Scientists already know the ages of the mare flows at the apollo sites from analyzing the radioisotopes in the rock samples , so they can estimate the ages of other flows by comparing their crater densities with those of the landing - site flows 科学家分析岩石样本中的放射性同位素，已经知道阿波罗登陆点的月海岩流年龄；因此将其他岩流的陨石坑密度与登陆点岩流的陨石坑密度相比，科学家便能估计其他岩流的年代。
Tgs method can determine quantitatively with high accuracy transuranic nuclides in heterogeneously distributed media with medium - and high - density , and is thus widely used to assay the location and quantity of selected radioisotopes in scraps and wastes within sealed containers 它是专用于准确定量测量中、高密度非均匀分布介质中的放射性核素及其含量，是核设施中可回收物以及核废物测量分析的主要方法之一。
Radioisotope dating of the impact - melt samples ? rocks that melted when an asteroid or comet struck the moon , therefore revealing when an impact occurred ? shows that all these basins formed in a narrow interval between 3 . 9 billion and 3 . 8 billion years ago 利用放射性同位素为撞击熔融物（在小行星或彗星撞击月球时熔化的岩石，因此它们能显示撞击发生的时间）定年，显示这些盆地都在39 ~ 38亿年前一个很短的时间内形成。
Given the decay rate of 26al , the lower initial ratio in the chondrules implies that these objects formed between one million and two million years after the creation of the refractory inclusions ( assuming that the radioisotope was indeed homogeneously distributed in the early solar system ) 以铝26的衰变速率估计，这些球粒的初始比值较低，表示它们是在耐火包体产生后100 ~ 200万年才形成（假设铝26在早期太阳系中确实是均匀分布的） 。
