Table 1
Information on photon energy spectra of the 125I and 103Pd, 169Yb, and 192Ir radionuclides reported by different databases
| 125I | 103Pd | |||||
|---|---|---|---|---|---|---|
| Reference | TG-43 U11 | LBNL19 | NNDC20 | Rivard16 | LBNL19 | NNDC21 |
| Energy range (keV) | 27.202-35492 | 3.335-35.4919 | 3.77-35.4925 | 22.074-497.054 | 2.377-497.08 | 2.7-487.08 |
| Total photons per disintegration | 1.4757 | 1.60482 | 1.5767 | 0.7713825 | 0.851569801 | 0.857582605 |
| Average energy (keV) | 28.370 | 27.541 | 26.059 | 21.319 | 19.038 | 18.889 |
| 169Yb | 192Ir | |||||
| Reference | Cazeca et al.17 | LBNL19 | NNDC22 | Medich and Munro18 | LBNL19 | NNDC23 |
| Energy range (keV) | 49.77-307.74 | 6.341-781.64 | 7.18-781.64 | 61.49-884.54 | 7.822-1378.3 | 9.44-1378.50 |
| Total photons per disintegration | 3.322 | 3.779 | 3.771 | 2.301 | 2.359 | 2.214 |
| Average energy (keV) | 92.797 | 82.622 | 82.781 | 354.356 | 346.736 | 369.525 |
LBNL = Lawrence Berkeley National Laboratory; NNDC = National Nuclear Data Center; TG-43 U1 = Recommendation of the American Association of Physicists in Medicine from task group No. 43 updated report
Table 2
Air kerma strength, dose rate constant, and dose rate at 1 cm for 125I, 103Pd, 169Yb, and 192Ir sources based on different photon energy spectra reported by other studies, LBNL, and NNDC databases
| Source | Other studies1, 16-18 | LBNL19 | NNDC20-23 | Diff. (%) Other study-NNDC | Diff. (%) LBNL-NNDC |
|---|---|---|---|---|---|
| Air kerma strength (cGycm2/h) | |||||
| 125I | 1.035 | 1.169 | 1.121 | -7.67 | 4.28 |
| 103Pd | 1.132 | 1.428 | 1.404 | -19.37 | 1.71 |
| 169Yb | 1.094 | 1.094 | 1.097 | -0.27 | -0.27 |
| 192Ir | 3.622 | 3.631 | 3.496 | 3.60 | 3.86 |
| Dose rate constant (cGy/hU) | |||||
| 125I | 1.115 | 0.961 | 1.013 | 10.07 | -5.13 |
| 103Pd | 0.830 | 0.658 | 0.669 | 24.06 | -1.64 |
| 169Yb | 1.222 | 1.226 | 1.222 | 0.00 | 0.33 |
| 192Ir | 1.117 | 1.117 | 1.117 | 0.00 | 0.00 |
| Dose rate at 1 cm (cGy/hmCi) | |||||
| 125I | 1.154 | 1.123 | 1.136 | 1.60 | -1.07 |
| 103Pd | 0.939 | 0.940 | 0.939 | 0.00 | 0.09 |
| 169Yb | 1.338 | 1.341 | 1.341 | -0.23 | 0.00 |
| 192Ir | 4.045 | 4.054 | 3.904 | 3.59 | 3.84 |
LBNL = Lawrence Berkeley National Laboratory; NNDC = National Nuclear Data Center
Table 3
Radial dose function for 125I, 103Pd, 169Yb, and 192Ir sources based on different photon energy spectra reported by other studies1,16-18, Lawrence Berkeley National Laboratory (LBNL)19, and National Nuclear Data Center (NNDC)20-23 databases
| Source | r (cm) | Other studies (A) | LBNL (B) | NNDC (C) | Diff. (%) A-C | Diff. (%) B-C | Source | Other studies (A) | LBNL (B) | NNDC (C) | Diff. (%) A-C | Diff. (%) B-C Pd |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 125I | 0.5 | 0.996 | 0.996 | 0.996 | 0.00 | 0.00 | 103Pd | 1.196 | 1.196 | 1.196 | 0.00 | 0.00 |
| 1 | 1.000 | 1.000 | 1.000 | 0.00 | 0.00 | 1.000 | 1.000 | 1.000 | 0.00 | 0.00 | ||
| 1.5 | 0.955 | 0.955 | 0.954 | 0.11 | 0.10 | 0.789 | 0.789 | 0.789 | 0.00 | 0.00 | ||
| 2 | 0.890 | 0.890 | 0.890 | 0.00 | 0.00 | 0.609 | 0.609 | 0.608 | 0.16 | 0.16 | ||
| 2.5 | 0.816 | 0.815 | 0.816 | 0.00 | -0.12 | 0.465 | 0.465 | 0.464 | 0.22 | 0.22 | ||
| 3 | 0.740 | 0.740 | 0.740 | 0.00 | 0.00 | 0.352 | 0.352 | 0.352 | 0.00 | 0.00 | ||
| 3.5 | 0.667 | 0.666 | 0.667 | 0.00 | -0.15 | 0.265 | 0.265 | 0.264 | 0.38 | 0.38 | ||
| 4 | 0.596 | 0.596 | 0.595 | 0.17 | 0.17 | 0.199 | 0.199 | 0.198 | 0.50 | 0.51 | ||
| 4.5 | 0.530 | 0.530 | 0.530 | 0.00 | 0.00 | 0.150 | 0.150 | 0.149 | 0.67 | 0.68 | ||
| 5 | 0.470 | 0.469 | 0.470 | 0.00 | -0.21 | 0.112 | 0.112 | 0.112 | 0.00 | 0.00 | ||
| 5.5 | 0.415 | 0.415 | 0.415 | 0.00 | 0.00 | 0.084 | 0.084 | 0.083 | 1.20 | 1.21 | ||
| 6 | 0.365 | 0.365 | 0.365 | 0.00 | 0.00 | 0.063 | 0.062 | 0.062 | 1.61 | 0.00 | ||
| 6.5 | 0.320 | 0.319 | 0.319 | 0.31 | 0.00 | 0.047 | 0.047 | 0.047 | 0.00 | 0.00 | ||
| 7 | 0.279 | 0.279 | 0.279 | 0.00 | 0.00 | 0.035 | 0.035 | 0.035 | 0.00 | 0.00 | ||
| 10 | 0.120 | 0.120 | 0.120 | 0.00 | 0.00 | 0.0066 | 0.0066 | 0.0065 | 1.54 | 1.54 | ||
| 15 | 0.029 | 0.029 | 0.029 | 0.00 | 0.00 | 0.0010 | 0.0010 | 0.0010 | 0.00 | 0.00 | ||
| 169Yb | 0.5 | 0.950 | 0.949 | 0.951 | -0.11 | -0.21 | 192Ir | 0.996 | 0.996 | 0.996 | 0.00 | 0.00 |
| 1 | 1.000 | 1.000 | 1.000 | 0.00 | 0.00 | 1.000 | 1.000 | 1.000 | 0.00 | 0.00 | ||
| 1.5 | 1.042 | 1.041 | 1.041 | 0.10 | 0.00 | 1.003 | 1.003 | 1.003 | 0.00 | 0.00 | ||
| 2 | 1.079 | 1.079 | 1.077 | 0.19 | 0.19 | 1.006 | 1.006 | 1.006 | 0.00 | 0.00 | ||
| 2.5 | 1.113 | 1.111 | 1.110 | 0.27 | 0.09 | 1.008 | 1.008 | 1.008 | 0.00 | 0.00 | ||
| 3 | 1.136 | 1.137 | 1.133 | 0.27 | 0.35 | 1.010 | 1.010 | 1.009 | 0.10 | 0.10 | ||
| 3.5 | 1.157 | 1.156 | 1.155 | 0.17 | 0.09 | 1.011 | 1.011 | 1.010 | 0.10 | 0.01 | ||
| 4 | 1.169 | 1.171 | 1.168 | 0.09 | 0.26 | 1.011 | 1.011 | 1.010 | 0.10 | 0.10 | ||
| 4.5 | 1.183 | 1.181 | 1.180 | 0.25 | 0.09 | 1.010 | 1.010 | 1.010 | 0.00 | 0.00 | ||
| 5 | 1.189 | 1.185 | 1.185 | 0.34 | 0.00 | 1.008 | 1.008 | 1.007 | 0.10 | 0.10 | ||
| 5.5 | 1.193 | 1.191 | 1.191 | 0.17 | 0.00 | 1.005 | 1.005 | 1.005 | 0.00 | 0.00 | ||
| 6 | 1.195 | 1.189 | 1.190 | 0.42 | -0.08 | 1.002 | 1.002 | 1.001 | 0.10 | 0.10 | ||
| 6.5 | 1.189 | 1.185 | 1.186 | 0.25 | -0.08 | 0.998 | 0.998 | 0.998 | 0.00 | 0.00 | ||
| 7 | 1.182 | 1.181 | 1.181 | 0.09 | 0.00 | 0.995 | 0.994 | 0.994 | 0.10 | 0.00 | ||
| 10 | 1.089 | 1.091 | 1.090 | -0.09 | 0.09 | 0.949 | 0.949 | 0.949 | 0.00 | 0.00 | ||
| 15 | 0.860 | 0.865 | 0.862 | -0.23 | 0.35 | 0.836 | 0.836 | 0.835 | 0.12 | 0.12 |
2D anisotropy function values for (A) 125I, (B) 103Pd, (C) 169Yb and (D) 192Ir sources at r = 0.5 cm (a), 5.0 cm (b), and 15.0 cm (c) distances.
Percentage differences (%) between the 2D anisotropy function obtained from National Nuclear Data Center (NNDC) and other references of energy spectra for (A) 125I, (B) 103Pd, (C) 169Yb, and (D) 192Ir sources.
Isodose curves for (A) 125I, (B) 103Pd, (C) 169Yb, and (D) 19 2Ir sources obtained by different photon energy spectra. The contours for various spectra are not clearly distinguishable due to their overlapping.