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物理剂量
相关语句
  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
短句来源
  “物理剂量”译为未确定词的双语例句
    Dosimetry Verification and Quality Assurance Test of IMRT
    调强放射治疗的物理剂量验证
短句来源
    We utilized micronucleus (MN) dose-effect calibration curves obtained by cytokinesis-block (CB) method and conventional method to estimate the biological doses to three irradiated persons in a60 Co source accident in Wuhan and one case of nonHodgkin's lymphoma total bodily irradiated with60Co source. The results showed that(1) the doses estimated by micronucleus assay were consistent with those by physical dosimetry and chromosome aberration analysis;
    用外周血淋巴细胞微核检测法对一起60Co源事故及1例非何杰金氏淋巴瘤60Co源全身照射治疗后的生物剂量进行了估算,取得与物理剂量或染色体剂量一致的结果。
短句来源
    Objectives: To analyze the glycophorin A(GPA) on erythrocytes of 2 victims of a radiatim accident(moderate degree bone marrow type of acute radiation sickness caused by 60 Co irradiation in Shanghai accident on June 25,1990)and to investigate GPA variation frequency(Vf) in these 2 victims and in blood samples of normal persons irradiated in vitro by γ ray.
    目的 :检测上海“6 .2 5”事故两例中度骨髓放射病病人 8年后血型糖蛋白A(GPA)变异频率和估算物理剂量的相关性 ; 同时测定正常人外周血在体外用γ线照射后红细胞GPA的变化。
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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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We utilized micronucleus (MN) dose-effect calibration curves obtained by cytokinesis-block (CB) method and conventional method to estimate the biological doses to three irradiated persons in a60 Co source accident in Wuhan and one case of nonHodgkin's lymphoma total bodily irradiated with60Co source.The results showed that(1) the doses estimated by micronucleus assay were consistent with those by physical dosimetry and chromosome aberration analysis;(2) the doses estimated 31 days post irradiation were still...

We utilized micronucleus (MN) dose-effect calibration curves obtained by cytokinesis-block (CB) method and conventional method to estimate the biological doses to three irradiated persons in a60 Co source accident in Wuhan and one case of nonHodgkin's lymphoma total bodily irradiated with60Co source.The results showed that(1) the doses estimated by micronucleus assay were consistent with those by physical dosimetry and chromosome aberration analysis;(2) the doses estimated 31 days post irradiation were still consistent with those originally estimated to the three accidental cases,although the former were a little lower than the latter.We consider that all of these MNC or MN calibration curves obtained by either CB MN method or conventional MN method could be used as biological dosimeters to estimate the exposure dose in radiation accident.

用外周血淋巴细胞微核检测法对一起60Co源事故及1例非何杰金氏淋巴瘤60Co源全身照射治疗后的生物剂量进行了估算,取得与物理剂量或染色体剂量一致的结果。照后31天的微核剂量仍能反映实际剂量,认为微核检测可作为生物剂量计用于估算受照者的生物剂量。在事故情况下,为尽早向临床提供剂量数据,可先观察52小时培养制片标本,计算出初步参考剂量,然后观察72小时培养制片的标本,给出正式剂量。

Objectives: To analyze the glycophorin A(GPA) on erythrocytes of 2 victims of a radiatim accident(moderate degree bone marrow type of acute radiation sickness caused by 60 Co irradiation in Shanghai accident on June 25,1990)and to investigate GPA variation frequency(Vf) in these 2 victims and in blood samples of normal persons irradiated in vitro by γ ray. Methods: The peripheral blood samples from normal people and victims were obtained. The erythrocytes were separated and fixed, and sorted by cytometry...

Objectives: To analyze the glycophorin A(GPA) on erythrocytes of 2 victims of a radiatim accident(moderate degree bone marrow type of acute radiation sickness caused by 60 Co irradiation in Shanghai accident on June 25,1990)and to investigate GPA variation frequency(Vf) in these 2 victims and in blood samples of normal persons irradiated in vitro by γ ray. Methods: The peripheral blood samples from normal people and victims were obtained. The erythrocytes were separated and fixed, and sorted by cytometry after conjugation with fluorescence labeled monoclonal antibodies in GPA assay. The variant erythrocytes were calculated, and the Vfs of 2 groups of samples irradiated in vitro by γ ray at 1,2,5,10 Gy were examined after 1,2 ,6 days. Results: The Vfs of 2 victims were higher than that of normal persons and the person with higher Vf has received the higher dosage, but no changes appeared in the blood irradiated in vitro even with 10 Gy. Conclusions: The Vfs of the variant erythrocytes are correlated with the estimated radiation dosage. Moderate dosage of γ ray radiation could not damage GPA directly, suggesting that the erythrocytes with variant GPA were induced by damaged stem cells. GPA assay may be useful for study on the late effect of radiation damage. [

目的 :检测上海“6 .2 5”事故两例中度骨髓放射病病人 8年后血型糖蛋白A(GPA)变异频率和估算物理剂量的相关性 ;同时测定正常人外周血在体外用γ线照射后红细胞GPA的变化。方法 :取正常人和事故患者外周血 ,分离红细胞并固定 ,在和荧光素标记的单抗结合后用流式细胞仪进行GPA分析 ,计算GPA变异频率 ;以两组正常人血样分批体外照射 1,2 ,5,10Gy ,在照射后放置 1,4 ,6d后进行检测。结果 :与正常人相比 ,两事故病例的GPA变异频率较高 ,其中变异频率较高者其估算受照剂量较高 ;体外照射外周血红细胞达 10Gy也未见GPA变化。 结论 :放射病病例变异红细胞频率与估算剂量间成正相关 ;外周血直接受照中度剂量不能导致GPA变化 ,提示GPA突变反映造血干细胞损伤 ,GPA分析法适合放射病远后效应跟踪研究

Objectives:To verify the dose accuracy a nd explo re for effective quality assurance(QA)procedure and measures of Peaco ck MIMic IMRT.Methods :(1)Conducting hybrid plans using phant om geometry a nd 43cases patient ' s incident beam fluence for peacock MIMic IMRT,with 10 5°~255°arc,beaml et changed every 5°for each case.Irradiation dose we re measure d by ionization chamber to verify the dose calculation of the inverse plan ning and the reliability of total dose output of I MRT devices.(2)Dose distribution...

Objectives:To verify the dose accuracy a nd explo re for effective quality assurance(QA)procedure and measures of Peaco ck MIMic IMRT.Methods :(1)Conducting hybrid plans using phant om geometry a nd 43cases patient ' s incident beam fluence for peacock MIMic IMRT,with 10 5°~255°arc,beaml et changed every 5°for each case.Irradiation dose we re measure d by ionization chamber to verify the dose calculation of the inverse plan ning and the reliability of total dose output of I MRT devices.(2)Dose distribution was measured repeatedly where the gradient was largest in the plan for testing the effect of positioning incorrectness.Results:(1)Relative di fference between measur ed dose and planned dose are within -0.74%~4.9 8%for all 43cases,average di fference was 2.38%,standard deviation wa s 1.39%and standard error was 0.21%.(2)Measured dose gradient was consiste nt with planning.Maximum measured dose difference of repeat p ositioni ng at the most gradient poin t was 1.97%,where the gradient was 15mm per centimeter and largest in all 43case s.Conclusion:Hybrid plan testing is ef ficient for dosi metry verification of IMRT planning and implementing.which sh ould be used as a QA procedure before e very patient ' s treatment.Additional p ositioning accuracy of less then 1m m would be necessary when doing IMRT.

目的:检验调强适形放射治疗IntensitymodulatetradiationtherapyIMRT的剂量误差,探索IMRT的质量控制和质量保证的措施和方法。方法:1用体模治疗计划移植的方法对43例IMRT治疗计划的照射区以电离室作实际物理剂量测量,以验证治疗计划系统剂量计算的准确性,照射设备的可靠性和稳定性,修正IMRT治疗剂量误差和确定其剂量精度范围。2选取计划照射区内剂量梯度变化较大处进行重复摆位测量剂量,推算和验证由于摆位误差可能造成的剂量误差。结果:1与计划剂量比较,实际测量剂量的相对误差范围为-0.74%~4.98%并近似正态分布,平均误差为2.38%,标准差为1.39%,标准误为0.21%。全部43例的剂量误差均在5%以内。2实际测量的剂量梯度变化与计划剂量梯度一致。全部计划中的最大梯度值为15%/mm。在该处重复摆位测量的最大与最小值的相对差别为1.97%。结论:用体模计划移植测量方法能有效检验IMRT计划计算和执行的误差,可作为每个病人治疗前的剂量验证常规方法;IMRT治疗精度的保证需要优于1mm的额外精确摆位。

 
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