Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The ET tube is in unchanged position from prior exam . Lungs are well expanded . Mild edema has improved from prior exam . The lungs are otherwise clear . There is no pleural effusion or pneumothorax . The cardiomediastinal silhouette is unremarkable .
    OUTPUT:
    
Improvement of mild pulmonary edema .