Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: An endotracheal tube terminating 3 .8 cm above the carina , multiple sternal wires , a gastric tube terminating within the stomach , and a left pacemaker projecting a single right ventricular lead are unchanged in position . Moderate cardiomegaly appears stable . Since ___ , there is continued improvement of a right mid zone opacity , with waxing and waning adjacent atelectasis , reflective of improved pneumonia . A persistent left retrocardiac opacity remains unchanged . There is no pneumothorax .
    OUTPUT:
    
1 . Improving right basilar pneumonia . 2 . Moderate cardiomegaly is unchanged since ___ .