Advanced Brachytherapy Physics - Vienna 2016

Linear attenuation coefficient Having the densities the same material measured at two tube voltages, one can solve for Z:

1 i , Z    G E 1 i

, Z  

i 





Z 4 F E

 1 i

 1   2

 0

 Z 4 F E Z    G E Z     , ,  



2 i

2 i

2 i

i

Or, solve for both Z and density simultanetously

M. Bazalova et al., PMB 53 (2008); Bazalova et al Radiother Oncol 86 (2008)