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物理剂量
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  physical dose
    Physical dose measurement and estimation in a patient irradiated in an 192 Ir accident.
    一例~(192)Ir源放射事故病人的物理剂量估算和测量
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  “物理剂量”译为未确定词的双语例句
    The accumulative dose estimated by using the multiple linear regressions is approximate to the dose estimated by physical method,thus it decreases the uncertainty of estimating cumulative dose and forecasting cancer risk by using GPA gene mutation frequency.
    多元回归方程估算的累积剂量更接近估算的物理剂量 ; 减少了GPA基因突变频率估算累积剂量和预测癌患风险的不确定度。
短句来源
    In an incident of coblt-60 source used for industrial radi-ography,two workers were repeatedly subjected to whole-body exposureununiformly within nine days. Physical estimates of doses suggested thatthe two workers had respectively received 60—140 rad and 15—30 rad.
    由于一次工业射线照相用的钴-60辐射源的事故,使两名工人在九天内重复地受到了不均匀的全身照射,物理剂量估算提示两人各自接受了60—140rad 和15—30rad 的照射。
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  physical dose
Excess risk of radiation-induced cancer at the distal part of proton radiation fields can thus be explained using SCCP calculations on the basis of the physical dose distributions.
      
Although shielding may be effective, in some cases, in reducing the physical dose of particle radiation, our cytogenetic results showed that the biological impact of the particle beam remain unchanged.
      
The number of chromosomal and chromatid breaks, deletions, as well as fragments, have been followed in correlation to the physical dose as assessed by the specific radioactivity of DNA.
      
The definition accepted in the USSR of the roentgen as the unit of physical dose
      
A BNCE of 4.6% in physical dose was determined for a 10×10?cm2 field, and of 10.4% for a 20×20?cm2 one.
      
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In an incident of coblt-60 source used for industrial radi-ography,two workers were repeatedly subjected to whole-body exposureununiformly within nine days.Physical estimates of doses suggested thatthe two workers had respectively received 60—140 rad and 15—30 rad.Ananalysis of chromosome aberrations was performed at the end of one weekafter the accident.Then,it is estimated that the doses correspounding toan equivalent of acute whole-body exposure are 33—54 rad and 14—18 radrespectively for the two workers.

由于一次工业射线照相用的钴-60辐射源的事故,使两名工人在九天内重复地受到了不均匀的全身照射,物理剂量估算提示两人各自接受了60—140rad 和15—30rad 的照射。事故后一周做了染色体畸变分析,并估算两人所受剂量各自相当于33—54rad 和14—18rad 的急性全身照射。

Objective To study the influence of individual radiation sensitivity on GPA gene mutation frequency and the way to adjust it. Methods Comet assay,cytokinesis-block micronucleus plus 3AB index technique,and multiple linear regression were used to determine the influence of individual radiation sensitivity on GPA gene mutation frequency in medical diagnostic X-ray workers,and then the fitted equation of multiple linear regression was obtained. Results There was individual difference in radiation sensitivity among...

Objective To study the influence of individual radiation sensitivity on GPA gene mutation frequency and the way to adjust it. Methods Comet assay,cytokinesis-block micronucleus plus 3AB index technique,and multiple linear regression were used to determine the influence of individual radiation sensitivity on GPA gene mutation frequency in medical diagnostic X-ray workers,and then the fitted equation of multiple linear regression was obtained. Results There was individual difference in radiation sensitivity among medical diagnostic X-ray workers,which is a factor influencing GPA gene mutation frequency.The stronger the individual radiation sensitivity,the higher the GPA gene mutation frequency.The correlation between GPA gene mutation frequency and radiation dose was strengthened after it was adjusted by the individual radiation sensitivity.The equation of multiple linear regression for GPA gene mutation frequency was obtained by the multiple factor analysis: Y_ N=24.7×10 -6+0.5×10 -6X_1-99.5×10 -6X_2+1.7×10 -6X_3,and the correlation coefficient r= 0.673. Conclusions The relationship between GPA N gene mutation frequency and cumulative dose is improved by adjustment for individual radiation sensitivity.The accumulative dose estimated by using the multiple linear regressions is approximate to the dose estimated by physical method,thus it decreases the uncertainty of estimating cumulative dose and forecasting cancer risk by using GPA gene mutation frequency.

目的 探讨个体辐射敏感性对GPA基因突变频率的影响及其校正方法。方法 利用彗星实验、CB微核 +3AB指数实验和多元线性回归统计分析方法 ,检测个体辐射敏感性及其对X射线工作者GPA基因突变频率剂量 效应曲线的影响 ,建立多元线性回归方程。结果 X射线工作者的辐射敏感性存在个体差异 ,个体辐射敏感性是GPA基因突变频率变异的影响因素 ;个体的辐射敏感性较高者 ,GPA基因突变频率较高 ;经个体辐射敏感性校正后GPA基因突变频率与剂量的相关性加强 ,GPAN基因突变频率的多元线性回归曲线方程 :YN=2 4 7× 10 - 6 +0 5× 10 - 6 X1 - 99 5× 10 - 6X2 +1 7× 10 - 6 X3,总相关系数r=0 6 73(P <0 0 1)。结论 用个体辐射敏感性指标校正个体差异 ,改善了GPA基因突变频率剂量 效应关系 ;多元回归方程估算的累积剂量更接近估算的物理剂量 ;减少了GPA基因突变频率估算累积剂量和预测癌患风险的不确定度。

Objective To explore the usage of FISH in retrospective biodosimetry for individuals who had chronically exposed to ionizing radiation. Methods Chromosomal aberrations from 22 occupational workers having exposed to X-ray radiation and from 10 controls were analysed using FISH with probes for chromosomes 1,4. Results The frequencies of translocation and total aberrations observed in X-ray workers were statistically higher than those of controls.The longer working time one had the higher frequency of translocation....

Objective To explore the usage of FISH in retrospective biodosimetry for individuals who had chronically exposed to ionizing radiation. Methods Chromosomal aberrations from 22 occupational workers having exposed to X-ray radiation and from 10 controls were analysed using FISH with probes for chromosomes 1,4. Results The frequencies of translocation and total aberrations observed in X-ray workers were statistically higher than those of controls.The longer working time one had the higher frequency of translocation. Conclusion The results indicate it is possible that FISH can be used in retrospective biodosimetry for individuals who have chronically exposed to ionizing radiation.\;

目的 对早年从事放射工作的人员进行剂量重建。方法 用 1#、4 #全染色体探针进行荧光原位杂交 (FISH)分析了 2 2名探伤人员及 10名对照者的染色体畸变。结果 探伤人员染色体易位率、总畸变率显著高于对照组 ,二者差异有统计学意义 ;染色体易位率随探伤工龄增加而增加 ;探伤人员生物剂量与物理剂量比较基本一致。结论 用FISH方法检测染色体畸变对早期受照射人员进行剂量重建是可行的。

 
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