Linear Attenuation Coefficient (LAC) and Mass Attenuation Coefficient | Radiology Physics Course #27

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The linear attenuation coefficient (LAC) determines the proportion of X-rays that are removed from the beam per unit distance. We will review the function of a coefficient and how that should help us to conceptualise LAC. LAC is determined by the combination of the photoelectric effect, compton scatter and rayleigh scatter - therefore, the X-ray beam energy, density of the tissue and atomic number of the tissue all contribute to the LAC.

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