Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval improvement in aeration of bilateral lower lobes consitent with improved bilateral effusions and atelectatic changes . Small bilateral pleural effusions persist . Cardiomediastinal silhouette remains enlarged but stable . No evidence of new consolidation or pneumothorax . Right subclavian central venous catheter remains with the tip at the upper SVC .
    OUTPUT:
    
Interval improvement in aeration of bilateral lower lobes due to impeoved bilateral effusions and atelectasis .