Hepatic veins gas bubbles in a case of emphysematous pyelonephritis

Abstract

measurements of a cross-section area and then reconstructing them into an image. According to a report, ultrasound has a better temporal resolution in a defined area, in comparison to CT. 16 Temporal resolution is of little importance for most applications of CT, as the structures imaged have minimal or no movement, except in cardiac CT. 17 Hence, fast moving gas bubbles in the IVC and HV, may not be demonstrated on a CT examination. In a water bath study it was demonstrated that ultrasound also has a higher sensitivity in detecting very tiny gas bubbles, in comparison to CT. 16 The experiment showed that immediately after the filling of a cup with water, ultrasound was able to demonstrate countless echogenic foci, representing gas bubbles. However, these gas bubbles only contribute to a slight decrease of density values on CT. Hence no gas bubbles were detectable on CT.