Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size is mildly enlarged . Mild pulmonary interstitial edema has not significantly changed when compared to the prior . Small bilateral pleural effusions are demonstrated , larger on the left . No pneumothorax is identified . No acute osseous abnormality is detected .
    OUTPUT:
    
Mild interstitial pulmonary edema , not significantly changed .