Chromosomal aberration analysis in peripheral lymphocytes of radiation workers.

Chromosomal aberration analyses were performed in two groups of radiation workers and in a group of healthy controls. Although the level of exposure was below the accepted annual limit of 50 mSv, the yields of chromosome fragments and of total aberrations were significantly higher in the radiation workers than in the controls. However, the frequencies of dicentric and ring chromosomes in the radiation workers were not significantly different from those in the controls.