Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size is mildly enlarged . The mediastinal contours are unremarkable . Previous pattern of pulmonary edema has improved with only mild pulmonary vascular congestion remaining . Aeration of the lung bases is incorrect streaky opacities , potentially atelectasis . A small right pleural effusion is noted . No pneumothorax is identified . No acute osseous abnormality is seen .
    OUTPUT:
    
1 . Interval improvement in pulmonary edema with only mild pulmonary vascular congestion and small right pleural effusion currently . 2 . Improved aeration of the lung bases with streaky bibasilar opacities , potentially atelectasis .