Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been slight interval increase in the moderate degree of interstitial and pulmonary alveolar edema . The cardiomediastinal silhouette is unchanged . There is likely a small left pleural effusion . No pneumothorax is identified .
    OUTPUT:
    
Slight interval progression of moderate interstitial and pulmonary alveolar edema .