Simulation study on the dosimetric parameters of domestically produced high-dose-rate brachytherapy <sup>192</sup>Ir source

Fig. 5. Comparison of the anisotropy function at different distances from the source center between this study and the literature reports (a) 1 cm, (b) 2 cm, (c) 5 cm, (d) 10 cm

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Table 1. Composition and percentage of materials

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Table 1. Composition and percentage of materials

材料 Material	密度 Density / g·cm^-3	元素及成分 / % Elements and ingredients
铱 Iridium	22.56	Ir(1)
06Cr19Ni10	7.93	C(0.08)、P(0.045)、Si(1.0)、S(0.03)、Cr(19)、Mn(2.0)、Fe(68.345)、Ni(9.5)
空气（干燥） Air (dry)	1.205×10^-3	H(0.012 4)、N(23.178 1)、O(75.526 7)、Ar(1.282 7)
液态水 Water	0.998 207	H(11.189 4)、O(88.810 6)

Table 2. Anisotropy function values for HDR ¹⁹²Ir source

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Table 2. Anisotropy function values for HDR ¹⁹²Ir source

$θ$ / (°)	体元距放射源距离 Distance from the voxel to the radiation source / cm
$θ$ / (°)	0.5	1	2	3	4	5	6	7	8	9	10	15	20
0	0.653 3	0.619 0	0.613 1	0.636 4	0.655 9	0.680 8	0.701 7	0.721 1	0.731 1	0.751 9	0.760 4	0.801 8	0.829 5
10	0.719 4	0.708 5	0.725 1	0.742 7	0.757 2	0.773 4	0.787 7	0.801 8	0.806 6	0.818 0	0.822 1	0.858 8	0.879 8
20	0.844 0	0.833 2	0.839 5	0.845 4	0.854 4	0.865 9	0.874 0	0.876 1	0.880 7	0.885 3	0.887 5	0.905 3	0.922 1
30	0.908 4	0.900 4	0.904 0	0.908 8	0.909 3	0.913 8	0.923 3	0.925 0	0.925 1	0.932 3	0.931 9	0.944 2	0.959 4
40	0.946 2	0.941 4	0.944 7	0.944 6	0.944 9	0.948 1	0.952 1	0.956 9	0.949 9	0.953 0	0.957 2	0.963 6	0.985 7
50	0.968 9	0.967 8	0.968 4	0.968 8	0.971 2	0.970 2	0.977 8	0.975 8	0.971 1	0.981 7	0.980 2	0.976 7	1.008 1
60	0.983 2	0.983 3	0.982 9	0.984 9	0.982 2	0.985 8	0.988 3	0.987 6	0.984 9	0.985 6	0.989 4	0.982 8	0.999 7
70	0.992 3	0.993 8	0.995 4	0.994 2	0.991 1	0.993 8	0.998 9	1.003 1	0.995 3	0.994 1	1.004 0	0.990 7	1.011 5
80	0.998 2	0.998 4	0.998 8	1.000 8	0.998 2	1.000 4	1.002 4	1.001 5	1.002 8	1.000 4	1.000 6	1.033 7	0.994 1
90	1.000 0	1.000 0	1.000 0	1.000 0	1.000 0	1.000 0	1.000 0	1.000 0	1.000 0	1.000 0	1.000 0	1.000 0	1.000 0
100	0.998 9	0.996 8	1.005 9	0.998 0	0.997 5	0.997 9	0.999 1	1.000 6	0.996 4	1.010 5	0.999 1	0.991 7	1.005 6
110	0.992 2	0.993 2	0.997 0	0.993 8	0.988 6	0.997 8	0.996 6	0.999 1	1.012 5	0.996 2	0.996 0	0.994 6	0.993 4
120	0.983 9	0.983 9	0.983 2	0.985 8	0.980 9	0.987 7	0.989 3	0.995 3	0.984 3	0.994 2	0.984 2	0.983 9	0.992 1
130	0.968 9	0.968 4	0.968 4	0.969 7	0.966 6	0.970 5	0.974 2	0.980 2	0.976 6	0.981 3	0.971 9	0.974 3	0.992 2
140	0.945 8	0.941 7	0.948 9	0.946 2	0.948 7	0.948 0	0.953 7	0.953 9	0.954 7	0.959 8	0.956 3	0.957 3	0.980 6
150		0.901 8	0.903 2	0.907 1	0.907 9	0.917 2	0.918 8	0.925 0	0.922 5	0.927 7	0.933 4	0.935 6	0.957 5
160		0.833 0	0.838 4	0.848 4	0.852 7	0.860 5	0.870 7	0.883 8	0.878 7	0.886 3	0.887 0	0.908 5	0.919 0
170			0.712 5	0.731 8	0.744 3	0.759 6	0.777 7	0.787 2	0.797 3	0.808 4	0.815 1	0.846 0	0.861 4
180									0.494 7	0.524 3	0.554 1	0.657 2	0.719 3

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Jinpeng HAN, Xingtao AN, Ji WANG, Zhijun YANG, Peiwei WANG, Jinjie WU, Kun WANG. Simulation study on the dosimetric parameters of domestically produced high-dose-rate brachytherapy ¹⁹²Ir source[J]. NUCLEAR TECHNIQUES, 2025, 48(2): 020302

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