The half value layer (HVL) of a material is defined as the thickness of the material needed to reduce the intensity of the incident x-ray beam to half its value. Assume that the x-ray beam is monochromatic, no scattering occurs and that material A (as shown in Figure 1) is homogeneous and has a linear attenuation coefficient (ua). Material A has an HVL of 1.5 mm. Calculate the ratio I,/lz as shown in Figure if x=5 mm. lo HA=?? 2x

The half value layer (HVL) of a material is defined as the thickness of the material needed to reduce the intensity of the incident x-ray beam to half its value. Assume that the x-ray beam is monochromatic, no scattering occurs and that material A (as shown in Figure 1) is homogeneous and has a linear attenuation coefficient (ua). Material A has an HVL of 1.5 mm. Calculate the ratio I,/lz as shown in Figure if x=5 mm. lo HA=?? 2x