目的对医用诊断X射线工作者染色体畸变断裂点的分布进行分析。
Objective To analyze the distribution of the chromosome aberration breakpoints from medical diagnostic X-ray workers.
虽然对染色体上断裂点多发部位的真正生物学意义尚不清楚，但可以肯定的是有关损伤热点的研究是辐射远后效应研究中十分重要的一部分。
Although the true biological significance of break point regions has been not clear, there is no doubt that research on hot damage point is important part of study on after effect of radiation.
方法：采用低叶酸tc 199培养诱导法，对80名孤独症儿童和80名正常儿童进行了外周血淋巴细胞染色体脆性位点表达检测和断裂点频率统计。
Method: Chromosome fragile sites and breakpoint expression by reducing folacin in TC199 medium were determined in 80 autistic children and 80 normal children.
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