The equivalent X-ray energies for the operating Xray tube voltages of the mammography unit (25–49 kV) were in the range of 15–25 keV Similarly, for a radiology
unit operating at 40–60 kV, the equivalent energy range was 25–40 keV, and for operating voltages greater
than 60 kV (i.e., 70–100 kV), the equivalent energy was in excess of 40 keV. The mechanical properties of epoxy
composites increased initially with an increase in the filler loading but a further increase in the WO3 loading
resulted in deterioration of flexural strength, modulus and hardness