CHEN Shaowen1 HUANG Long1 WU Muying1 TANG Qiang2 LIU Xiaowei2 ZHANG Chunxiang2 1. Monte Carlo calculation of dose point kernel and absorbed dose distribution for electrons and photons[J]. Nuclear techniques, 2013, 36(7): 070205
CHEN Shaowen1 HUANG Long1 WU Muying1 TANG Qiang2 LIU Xiaowei2 ZHANG Chunxiang2 1. Monte Carlo calculation of dose point kernel and absorbed dose distribution for electrons and photons[J]. Nuclear techniques, 2013, 36(7): 070205 DOI: 10.11889/j.0253-3219.2013.hjs.36.070205.
计算活度为1 MBq/cm3的32P、90Y、131I放射性核素以及15 keV、30 keV、100 keV单能光子均匀分布在水(肿瘤)球壳(0.22 r 0.66cm)时的径向剂量率分布
并与国内外其它计算结果相比较。结果可为放射性核素治疗剂量计算提供参考。
Abstract
Background: The dose point kernel and the absorbed fraction are essential in the absorbed dose calculation for radionuclide therapy.Purpose: To calculate the scaled dose point kernels for 1 MeV monoenergetic electrons and32P
90Y
131I radionuclides
the absorbed fractions for 0.2 MeV and 4 MeV monoenergetic electrons and 32P
90Y radionuclides which uniformly distributed in water spheres of various mass ranging from 10 2to 103g
and the radial distributions of absorbed dose rates for 32P
131I
90Y nuclides and 15 keV
30 keV
100 keV photons which uniformly distributed in a water(tumor) spherical shell(0.22 r 0.66 cm) with an activity of 1 MBq/cm3.Methods: EGSnrc Monte Carlo programs were used for simulation.Results: The calculation results were compared with those of other works.Conclusions: The results could give some help to absorbed dose calculations for radionuclide therapy.