Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable upright view of the chest demonstrates endotracheal tube terminating 4 .5 cm above the carina . Nasogastric tube is positioned within the stomach . Large right lung base consolidation seen on study obtained nine hours prior has significantly improved . A small opacity remains in the right middle lobe , which obscures right cardiac border . No pleural effusion or pneumothorax . Hilar and mediastinal silhouettes are unchanged . Heart size is normal . Surgical clips , IVC filter and ___ project over partially imaged upper abdomen .
    OUTPUT:
    
In comparison to study obtained nine hours prior , the right lung base opacity has significantly improved . Left mid lung opacities persist , which may represent atelectasis or infection in the appropriate clinical setting .