Biological dose estimation of ionizing radiation by using micronucleus assay

Authors

10.22052/5.2.39

Abstract

Rapid development in nuclear industry and medical applications involving radiation sources would increase the potential of exposure to the ionizing radiation. Due to the harmful effects of radiation exposure on the health of radiation workers, rapid dose estimation of the overexposed victims with high accuracy is quite important in taking appropriate medical treatment plan. Biological dosimetry based on micronucleous (MN) assay is a perfect technique with unique advantages for a fast triage in radiation accidents. To develop the dose response curve, blood samples of 16 healthy individuals in two groups of male and female and in two age ranges were collected and exposed to 0, 0.25, 0.5, 1, 2 and 4 Gy gamma rays, cultured, harvested, slides prepared and micronuclei in each dose scored. The results showed that the curve follow linear quadratic formula. In order to validate the performance of created dose response curve, two real accidental over-exposed workers and two unknown irradiated blood samples were investigated by newly established curve and compared with results obtained by metaphase analysis (dicentric). The doses estimated by MN assay showed a very good conformity with those estimated by dicentric analysis, pointing out that the MN assay is a reliable, easier and valuable alternative method for biological dosimetry.
 

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References

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