方法 比较和分析5例鼻咽癌7野后程3DCRT和其相应的2DRT在各靶区和重要器官的剂量体积直方图(dose volume histogram,DVH)的各项指标值.
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器官的剂量体积直方图 dose volume histogram ; DVH
对具有完整剂量体积直方图(DVH)资料的84例进行统计以找出与RILD发生有关的剂量学因素。
Among 84 patients who had full dose-volume histogram (DVH) data, the relation between RILD and dosimetric parameters were analyzed.
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。
All plans were compared according to the planning target volume coverage, dose-volume histogram and other dosimetric parameters of normal tissues.
目前放疗逆向计划中常用的目标函数有两种：基于剂量分布的目标函数和基于剂量-体积直方图(DVH)的目标函数。
There are two kinds of objective functions in radiotherapy inverse planning: dose distribution-based and Dose-Volume Histogram (DVH) -based functions.
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