Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to prior examination , a left pleural effusion is minimally decreased , now small - moderate in size . There is adjacent linear opacities suggestive of atelectasis within left lower lobe . The left upper lung field and right lung are grossly clear . The silhouette is stable . Multiple , left rib fractures are again seen .
    OUTPUT:
    
Minimally improved small - moderate left pleural effusion with adjacent atelectasis .