Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: ET tube and left subclavian central line remain in satisfactory position . Compared with 5 hours prior , the widespread pulmonary opacification continues to improve . Severe cardiomegaly and small pleural effusions are unchanged . No pneumothorax .
    OUTPUT:
    
Interval improvement in pulmonary edema since 5 hours prior .