In this work, were determined some radiation shielding and dosimetric parameters of three types of bricks for
photons energy from 1 keV to 100 GeV photons using the Phy-X/PSD software, and for comparison also has been
calculated the same parameters for NBS concrete. The parameters calculated are the linear attenuation coefficients
(LAC), effective atomic numbers (Zeff), half value layers (HVL), the energy absorption buildup factors
(EABF) and the exposure buildup factors (EBF), as well as the coefficients to use the geometric progression (G-P)
fitting method. Obtained results show that the three types of bricks can be used safely for the design of medical
facilities housing mammography units (less than 30 keV).