ICU Sarcopenia Rates by Abdominal CT: Sepsis vs. Trauma

Using abdominal computed tomography (CT) imaging, the investigators will estimate total body muscle mass at two time points in Intensive Care Unit (ICU) by assessing cross-sectional muscle areas at the L3 vertebral body level. This allows for a determination of the rate of sarcopenia development in the ICU. With this information, the investigators propose to test if the rates of the development of sarcopenia differ in critically ill subjects with sepsis compared to a reference group of critically ill subjects with trauma (without sepsis).