Keywords: chromosomal aberrations, cytogenetic biomonitoring, low-dose X-irradiation, occupational exposure, low radiation, Iran
Chromosomal aberrations in Iranian radiation workers due to chronic exposure of X-irradiation
The frequency of chromosomal aberrations in the peripheral blood lymphocytes of 65 radiology technologists working in hospitals in Tehran, Iran, who had been chronically exposed to X-rays, was analysed. Although film dosimetery did not show the maximal annual permitted dose (20 mSv per year) in any of the examined subjects, cytogenetic analysis detected fairly high levels of chromosomal aberrations in the technologists compared to unexposed controls. The mean frequencies of structural chromosome aberration per 100 lymphocyte metaphases of workers and the controls were 2.93 and 0.54, respectively, excluding the high level of achromatic lesions registered. The difference between them was statistically significant with a P-value of <0.05.