For most people more than half of their natural background radiation dose comes from radon, a radioactive gas that can accumulate in homes, schools and workplaces.
对大多数人来说，他们自然环境辐射剂量的一半以上来自氡—一种可聚集在家庭、学校和工作场所的放射性气体。
The heightened accuracy allows for a more precise radiation dose and a more targeted area for treatment of the tumor.
而提高精确性之后就能使用更准确的放射剂量，并更好的对肿瘤进行定位。
The International Atomic Energy Agency (IAEA) confirmed today that elevated radiation (" dose rates up to 400 millisieverts per hour ") had been reported at the plant.
国际原子能机构今日证实，核电站的辐射水平确有提高(“的确达到了每小时400毫西弗”)。
A full-body CT scan gives a radiation dose of 20-30 millisieverts.
一次全身CT扫描的辐射剂量是20 ~30毫希弗。
Edelstein's calculations show that the crew would receive a radiation dose of more than 10, 000 sieverts within a second.
据Edelstein计算，宇宙飞船的船员将在一秒内受到10000西弗特的辐射。
To put that in perspective, in the United States, a person typically gets a radiation dose of 6.2 millisieverts per year.
从客观的角度看来，在美国，一个人通常一年受到的辐射量为6.2毫西韦特。
In the gamma knife treatment planning system, the calculation of radiation dose distributions must be done precisely and rapidly.
在伽玛刀治疗计划系统中，必须准确快速地计算辐射吸收剂量，制定出治疗计划。
The Yale group suggested that patients should have access to proper disclosure of radiation dose and possible cancer risks.
耶尔大学研究组认为病人应该知道关于辐射剂量以及致癌性方面的知识。
The radiation dose can be expressed in units of Sievert (Sv).
辐射剂量可以西弗特(Sv)为单位。
If a damaged cell is able to survive a radiation dose, the effects of the cell damage may never become apparent.
如果一个受损细胞在接触一定量的辐射后存活下来，那么细胞受损的危害就不易被察觉。
The effect of resin compounding ratio and radiation dose on blends of epoxy resin 828 and 648 systems was analyzed.
分析了树脂配比及辐射剂量对环氧828／648树脂混合体系的影响；
Analysis of the radiation dose used during CT indicated that it was on par with that used during diagnostic cardiac catheterization.
辐射剂量分析发现CT扫描过程产生的辐射剂量与导管造影的辐射剂量相近。
We designed a long and wide corridor that they can run at full power, and installed Sand and the pool in indoors where they can play without worrying about radiation dose.
我们设计了一个长且宽的走廊，还在室内设置一个沙坑和一个泳池，孩子们可以在其中尽情跑动、玩耍，不用担心室外辐射。
In fact the astronauts whizzed through in a matter of hours, receiving a radiation dose no greater than a medical X-ray.
事实上，宇航员们仅用了几个小时就穿过了这一层，受到的辐射量和接受一次X光透视检查差不多。
How to effectively reduce the radiation dose and ensure the quality of image of the child patients in the ct examination should engage fully understanding by the radiation workers.
儿童患者在CT检查中怎样有效减少辐射剂量，同时又能保证图像质量，作为从事放射工作人员应该充分认识。
The continuous measuring for environmental radon and radon progeny is the premise to calculate the radiation dose from radon precisely.
环境氡和氡子体连续测量是准确计算氡的辐射剂量、客观评价氡危害的前提。
Additional collimation after the patient to further define the image width, whether an absorbent material or electronic, causes radiation dose to the patient to be wasted.
无论是一种可吸收材料还是电子材料，在病人进一步确定影像的宽度之后，再进行额外的照射，导致给病人的放射剂量被浪费。
Based on the Monte Carlo MCNP code, the changes of radiation dose at the shield water tank surface during the process of lost water is studied.
基于蒙特卡罗方法的MCNP程序，研究了反应堆屏蔽水箱失水过程中的水箱表面辐射剂量的变化情况。
Objective To measure and evaluate the distribution feature of radiation dose at the conventional puncture plane in invasive diagnosis and treatment area, and depict the corresponding isodose curve.
目的测量和评价介入诊疗区域内常规穿刺平面辐射剂量的分布特点，绘制相应的等剂量曲线示意图。
There is growing concern regarding the radiation dose delivered during interventional procedures, particularly in view of the increasing frequency and complexity of these techniques.
由放射性介入操作所导致的辐射剂量已引起人们越来越多的关注，尤其是考虑到该项操作的频率不断增加和日趋复杂化。
As a survey meter, it automatically measures and records the radiation dose by means of per-set address coding and historical dose accumulation time.
作为辐射巡测仪，它可以按照预先设定的地址编码和剂量历史时间，自动连续测量和记录辐射剂量。
The relative crystallinity of refined cotton cellulose was studied by IR. The results shows that the relative crystallinity of cellulose decrease with the increasing of radiation dose .
用IR研究了经射线辐射的精制棉纤维素的相对结晶度的变化，结果表明随辐射剂量的加大，棉纤维素的相对结晶度逐渐减小。
Studies have focused on three fields: the radiation dose levels currently encountered in interventional procedures, the consequent risk to operators and patients and protection methods.
现有研究的主要集中于三个方面：目前放射性介入操作中的剂量水平、操作人员和患者的辐射危险以及辐射防护措施。
The radiation dose level of miners in uranium mines depends mainly pn the ventilation conditions.
铀矿工辐射剂量水平主要取决于通风状况。
Deduced has been a relationship between the threshold voltage of MOSFET and the radiation dose rate.
计算了MOSFET阈电压与辐射剂量率之间的关系。
Experimentation indicates: under the same radiation dose, ionizing radiation damage at low dose rate is more than that at high dose rate.
试验表明：在相同辐射剂量下，低剂量率辐照损伤比高剂量率大。
Therefore, it has become an important issue in radiation oncology to seek for measures to decrease local radiation dose and increase anti-tumor effect.
因此，探寻增加肿瘤放射敏感性和放射效应的措施成为放射肿瘤学一个非常重要的课题。
Conclusions radiation retinopathy in NPC patients is related to the radiation dose and individual difference in radiosensitivity.
结论NPC放射治疗性视网膜病变与照射剂量和患者对射线的个体敏感性差异有关。
CONCLUSIONS: radiation retinopathy in NPC patients is related to the radiation dose and individual difference in radiosensitivity.
结论：NPC放射治疗致视网膜病变与照射剂量和患者对射线的个体敏感性差异有关。
CONCLUSIONS: radiation retinopathy in NPC patients is related to the radiation dose and individual difference in radiosensitivity.
结论：NPC放射治疗致视网膜病变与照射剂量和患者对射线的个体敏感性差异有关。
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