Table 3
Equivalent dose rate coefficients for pure beta emitters and radionuclides with maximum beta energy above 1 MeV.
| Radionuclide | Equivalent dose rate coefficient (μSv/h/GBq at 1 m) | Reference |
|---|---|---|
| phosphorus-32 | 15.2 | n.c. |
| strontium-89 | 35.2 | n.c. |
| yttrium-90: Liquid form SIR-sphere® Therasphere® |
20.3 4 2 |
(Aubert et al., 2002) (McCann et al., 2012) (McCann et al., 2012) |
| erbium-169 | 8.3 | n.c. |
| rhenium-186 | 28.1 | n.c. |
n.c.: not concerned. The equivalent dose rate coefficients for these radionuclides were derived from the coefficient for yttrium-90 (liquid form, i.e., 20.3 μSv/h/GBq at 1 m as indicated above), taken as a reference. The calculation assumed proportionality between the maximum beta energy of the radionuclide and that of yttrium-90, while also accounting for the beta emission intensity (%) and the ratio 21/7.9 corresponding to the ratio of the effective atomic numbers of bone to soft tissue.
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