The fluence distribution must be known for absolute gamma ray measurements in spherical radiationfields.
注量率分布是球面源伽玛射线强度绝对测量的必需参数。
2
In this paper, a hybrid method which combines the physical optics method with the rays theory is used for calculating the radiationfields of the reflector antenna.
Objective To compare the acute radiation reactions and sequelae with different radiationfields and different modes of fractionated radiotherapy for nasopharyngeal carcinoma.