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作者介绍了尿钚裂变径迹分析法（简称ＦＴＡ），剂量评估的现代资料，总结了１９８１年～１９９１年中Ｒｏｎｇｅｌａｐ和Ｕｔｉｒｉｋ岛居民钚－２３９内照剂量估算的结果。目前ＦＴＡ钚－２３９的探测水平（９９％）为２～３μＢｑ，这相当于马绍尔居民到７０岁时，０．２～０．３ｍＳｖ的有效剂量当量（ＥＤＥ）。大多数样品均低于该探测水平。１９９１年，由于少数几个高数据，使平均值偏高，因而Ｒｏｎｇｅｌａｐ和Ｕｔｉｒｉｋ岛居民的钚－２３９平均有效剂量当量估计为０．６２和１．６ｍＳｖ。这是自从１９８８年以来的最高值。
The authors present the modern data on urinary and plutonic fission track analysis (FTA) and dose assessment, and summarize the estimates of internal doses of plutonium-239 in Rongelap and Utirik Island from 1981 to 1991. At present, the detection level (99%) of FTA-Pu-239 is 2-3 μBq, which is equivalent to an effective dose equivalent (EDE) of 0.2-0.3 mSv for Marshall residents aged 70 years. Most samples are below this level of detection. In 1991, the average effective dose equivalent of plutonium-239 for residents of Rongelap and Utirik Island was estimated to be 0.62 and 1.6 mSv, due to the high average values due to the few high data. This is the highest since 1988.