Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since the prior exam , there has been continued improvement in the diffuse bilateral upper lung zone interstitial opacities , which may represent alveolar hemorrhage or edema . No new opacity is identified . The small right pleural effusion has improved . A tiny one is likely still present . There is no left pleural effusion . No pneumothorax identified . Enlargement of the cardiomediastinal silhouette has also lessened . Sternal wires are unchanged .
    OUTPUT:
    
Continued improvement in the bilateral interstitial opacities , as described above .