Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is persistent bibasilar opacification , left greater than the right , not changed from ___ . There is probably small right pleural effusion . Mildly enlarged cardiomediastinal silhouette is stable . Mild pulmonary vascular congestion is improved . Tracheostomy tube is not well visualized but appear grossly unchanged in position .
    OUTPUT:
    
Persistent bibasilar opacification , left greater than right , consistent with bibasilar atelectasis . Mild pulmonary vessel congestion is improved .