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首页> 外文期刊>Applied radiation and isotopes: including data, instrumentation and methods for use in agriculture, industry and medicine >The evaluation of neutron and gamma ray dose equivalent distributions in patients and the effectiveness of shield materials for high energy photons radiotherapy facilities
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The evaluation of neutron and gamma ray dose equivalent distributions in patients and the effectiveness of shield materials for high energy photons radiotherapy facilities

机译:评估患者中子和伽马射线剂量当量分布以及屏蔽材料对高能光子放射治疗设施的有效性

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摘要

In this study, the MCNP5 code was used to model radiotherapy room of a medical linear accelerator operating at 18. MV and to evaluate the neutron and the secondary gamma ray fluences, the energy spectra and the dose equivalent distributions inside a liquid tissue-equivalent (TE) phantom. The obtained results were compared with measured data published in the literature. Moreover, the shielding effects of various neutron material shields on the radiotherapy room wall were also investigated. Our simulation results showed that paraffin wax containing boron carbide presents enough effectiveness to reduce both neutron and secondary gamma ray doses.
机译:在这项研究中,MCNP5代码用于为18 MV操作的医疗线性加速器的放射治疗室建模,并评估中子和次级伽马射线通量,能谱以及等效于液体组织内部的剂量当量分布( TE)幻影。将获得的结果与文献中公布的测量数据进行比较。此外,还研究了各种中子材料屏蔽层对放射治疗室壁的屏蔽作用。我们的模拟结果表明,含碳化硼的石蜡具有足够的功效,可以减少中子和二次伽马射线剂量。

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