BNCT人头体模内剂量分布计算

Calculation of physical dose distributions for the head phantom of BNCT

用修正的Synder人头体模几何模型和ICRU—46中的材料数据,用MCNP-4B程序对0.0253eV、1keV、2keV、10keV、100keV、1MeV单能中子束,0.2、0.5、1、2、5、10MeV单能光子束,以及与当前硼中子俘获治疗(BNCT)临床中使用的超热中子相似的超热中子束,计算了在人头体模中的剂量分布,计算结果与有关文献报道的结果一致,初步校验了我们正在编制的BNCT治疗计划软件。

Based on the modified Synder geometry and the material data given by ICRU-46,we have calculated, using Monte Carlo method, the depth dose curves of the head phantom of BNCT. The calculation is performed using individual monoenergetic and monodirectional beams of 0.0253eV, 1keV, 2keV, 10keV, 100keV and 1MeV neutrons, and 0.2, 0.5, 1, 2, 5 and 10 MeV photons. And a generic epithermal neutron beam with 1% fast neutron (10keV -2MeV) contamination and 10% thermal neutron (ImeV - 0.5eV) contamination is also employed. The results show an agreement accordance with the relative reference, which verify our treatment programming software ofBNCT.