Ongoing research on monitoring of internal exposure of nuclear medical staff / 中华放射医学与防护杂志

With the wide application of nuclear medicine and the increase in the number of related staff, the potential occupational health problems should receive enough attention. At present, the personal dose monitoring of most radiation workers in nuclear medicine is mainly based on the information on external exposure provided by thermoluminescence dosimeters whereas the routine internal exposure monitoring has not fully been carried out, thus resulting in underestimating their annual effective dose. Comprehensive personal dose monitoring is not only an important part of occupational health monitoring, but also a crucial means of occupational health management. In this paper, the characteristics of internal exposure in nuclear medicine were analyzed, the monitoring techniques and dose estimating method were introduced, and several commonly used softwares were listed, so as to comprehensively and objectively learn about the current internal radiation exposure of nuclear medicine workers, and to provide reference for health administration departments to formulate regulatory policies and protection requirements.

Effect of low-dose radiation on frequencies of chromosome aberrations and micronucleus-containing cells of occupationally exposed individuals: a Meta analysis / 中华放射医学与防护杂志

Objective To quantitatively investigate the effect of low-dose ionizing radiation on the frequencies of chromosome aberrations and micronucleus-containing cells of radiation workers.Methods Nine electronic databases were systematically searched on the basis of the published studies evaluating the effects of low-dose ionizing radiation on the frequencies of chromosome aberrations and micronucleuscontaining cells.Of the 195 studies searched,21 studies were identified with a total of 1 970 626 cells under studying.Cochrane' s Q and I2 statistics were used to evaluate heterogeneity among studies and pooling odds ratio (OR) with 95％ confidence intervals (CI) were calculated using random-effect models or fixed-effect models,and publication bias were also calculated.Meta-analysis was performed using Stata 12.0.Results The pooling OR of chromosome-type aberrations [OR =3.03 (2.59,3.56)],dicentric plus centric rings [OR =4.12 (2.99,5.67)],translocations [OR =2.73 (1.67,4.46)],micronucleuscontaining cells [OR =1.70 (1.40-2.06)] were higher for radiation workers when compared with control group.Conclusions The frequencies of chromosome aberrations and micronucleus cell of peripheral lymphocytes are significantly high in radiation workers who were occupationally exposed to low-dose ionizing radiation.It should be noted that the radiation protection of radiological workers be enhanced.