Why are entrance skin dose rates to larger patients generally greater than those to smaller patients?

Entrance skin dose rates to larger patients are generally greater than those to smaller patients due to the increased volume of tissue that must be irradiated, which can lead to higher cumulative doses. Additionally, larger patients often require higher exposure settings to achieve adequate imaging quality, contributing to increased dose rates. The thicker body mass can also attenuate the beam differently, resulting in more scattered radiation reaching the skin. Consequently, these factors combine to elevate the overall dose received by larger patients during imaging procedures.