The fluence distribution must be known for absolute gamma ray measurements in spherical radiation fields.
注量率分布是球面源伽玛射线强度绝对测量的必需参数。
In this paper, a hybrid method which combines the physical optics method with the rays theory is used for calculating the radiation fields of the reflector antenna.
本文论述了运用物理光学、射线理论混合分析反射面天线的过程，确定了混合方法在计算一般反射面天线时的分界区域。
Objective To compare the acute radiation reactions and sequelae with different radiation fields and different modes of fractionated radiotherapy for nasopharyngeal carcinoma.
目的比较不同照射野或不同剂量分割放疗鼻咽癌的急性放射反应及后遗症。
Detection system makes the core equipment for collecting feature information of radiation fields, and is the key point and technical basis for carrying out pulsed radiation detection.
探测系统是获取辐射场特征信息的核心器件，是实施脉冲辐射探测的关键和技术基础，其性能直接决定测试数据的质量和测试方法的选择。
Purpose: to assess the adequacy of common iliac lymph node coverage of conventional pelvic radiation fields for the treatment of cervical carcinoma, using computed tomography (CT) images.
目的：使用CT图像评价宫颈癌传统盆腔照射野对髂总淋巴结的包含程度。
A fast method for electromagnetic scattering and radiation problems pertinent to objects above a lossy ground is presented, and the scattering and radiation fields by grounds are taken into account.
本文引入一种求解有耗地面上方物体的电磁散射和辐射问题的快速算法，能有效地计入地面反射效应对散射和辐射场的影响。
A fast method for electromagnetic scattering and radiation problems pertinent to objects above a lossy ground is presented, and the scattering and radiation fields by grounds are taken into account.
本文引入一种求解有耗地面上方物体的电磁散射和辐射问题的快速算法，能有效地计入地面反射效应对散射和辐射场的影响。
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