Current WHO estimates suggest that the vaccine storage requirements would at least double if only single-dose presentations were used (WHO vaccine volume calculator, March 2011).

目前，世卫组织估计表明，如果仅提供单剂疫苗，那么疫苗的存储需求将至少是现在的两倍(世卫组织疫苗量计算工具，2011年3月)。

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All plans were compared according to the planning target volume coverage, dose-volume histogram and other dosimetric parameters of normal tissues.

根据计划靶区的等剂量分布、体积-剂量直方图以及其他的剂量学指标，比较两种不同治疗计划的优劣。

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Conclusions: the beam Angle and the number of beams have influence upon dose distribution, the dose distribution would be improved for large volume target with the increment of beam number.

结论：照射野方向和照射野的数目对剂量分布有影响，增加照射野的数目可以改善体积较大的病灶的剂量分布。

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