Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette remains enlarged . Bilateral areas of septal thickening have resolved since the prior study , and slightly confluent opacities in the lower lobes centrally have also improved . Small pleural effusions are again demonstrated . No acute skeletal findings .
    OUTPUT:
    
1 . Resolution of interstitial edema . Improving lower lobe opacities may reflect dependent edema and atelectasis but continued follow up radiographs may be helpful to ensure resolution given clinical concern for infection . 2 . Persistent small pleural effusions .