The health effects caused by radiation exposure depend on its level, type and duration.
辐射对健康的影响与其剂量、类型与持续时间有关。
Is there a 'safe' level of radiation exposure for a patient during pregnancy?
是否有患者在怀孕期间的“安全”辐射暴露上限？
Analysis and evaluation were carried out on the safety grade of the radiation source, radiation prevention site and the exposure dose level of the working staff.
方法通过现场监测，按照标准对辐射源安全级别，场所辐射防护区域，工作人员接受的剂量水平进行分析评价。
Thermoluminescence studies of meteorites suggest that the level of natural TL in meteorites is determined by competition between build up, due to exposure to cosmic radiation, and thermal decay.
陨石热释光研究揭示了陨石中自然TL值取决于陨石暴露在宇宙空间时的宇宙射线辐照和自身热衰变之间的平衡。
Conclusion Radiation injuries may effectively decreased with reducing X-ray tube voltage and exposure level under the precondition of X-ray image quality to be guaranteed.
结论在保证X线图像质量前提下，降低X射线管电压和曝光量，可以有效地减少放射性损害。
Conclusion Radiation injuries may effectively decreased with reducing X-ray tube voltage and exposure level under the precondition of X-ray image quality to be guaranteed.
结论在保证X线图像质量前提下，降低X射线管电压和曝光量，可以有效地减少放射性损害。
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