染色體雙中節分析法係一種人員生物劑量評估技術，透過分析經輻射照射之細胞產生的雙中節個數，回推人員所接受到的輻射劑量。當發生輻射意外事故時，可利用該技術評估未配戴劑量佩章之民眾或工作人員所接受輻射劑量，並作為後續醫務監護作業之重要參考。

The dicentric chromosome assay(DCA) is a biodosimetry method used to estimate radiationdose. By analyzing the number of dicentric chromosomes produced in cells exposed to radiation, the radiation dose can be estimated. When radiation exposure accidents occur, DCA can be used to estimate the radiation dose received by the public or radiation workers who were not wearing dosimeters, serving as an important reference for