Comparison of the hypothetical 57Co brachytherapy source with the 192Ir source
Contemporary Oncology/Współczesna Onkologia, 2016•termedia.pl
Results: The results are presented as tables and figures. Air kerma strength per 1 mCi
activity for the 57 Co source was 0.46 cGyh–1 cm 2 mCi–1. The dose rate constant for the 57
Co source was determined to be 1.215 cGyh–1U–1. The radial dose function for the 57 Co
source has an increasing trend due to multiple scattering of low energy photons. The
anisotropy function for the 57 Co source at various distances from the source is more
isotropic than the 192 Ir source. Conclusions: The 57 Co source has advantages over 192 Ir …
activity for the 57 Co source was 0.46 cGyh–1 cm 2 mCi–1. The dose rate constant for the 57
Co source was determined to be 1.215 cGyh–1U–1. The radial dose function for the 57 Co
source has an increasing trend due to multiple scattering of low energy photons. The
anisotropy function for the 57 Co source at various distances from the source is more
isotropic than the 192 Ir source. Conclusions: The 57 Co source has advantages over 192 Ir …
Results: The results are presented as tables and figures. Air kerma strength per 1 mCi activity for the 57 Co source was 0.46 cGyh–1 cm 2 mCi–1. The dose rate constant for the 57 Co source was determined to be 1.215 cGyh–1U–1. The radial dose function for the 57 Co source has an increasing trend due to multiple scattering of low energy photons. The anisotropy function for the 57 Co source at various distances from the source is more isotropic than the 192 Ir source.
Conclusions: The 57 Co source has advantages over 192 Ir due to its lower energy photons, longer half-life, higher dose rate constant and more isotropic anisotropic function. However, the 192 Ir source has a higher initial air kerma strength and more uniform radial dose function. These properties make 57 Co a suitable source for use in brachytherapy applications.
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