Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been improvement in the collapse of the left lower lobe with improved aeration in the upper lung zones as well as the left pleural effusion . The right lung is overall clear . The cardiac silhouette is not enlarged . There is no definite pneumomediastinum . A tiny left apical pneumothorax is present . A left upper extremity PICC terminates in the cavoatrial junction . The ETT terminates in the mid trachea in unchanged position . A right pleural pigtail catheter is also unchanged . Included upper abdomen is unremarkable . Spinal hardware is noted .
    OUTPUT:
    
1 . Interval improvement in the left lower lung collapse as well as now moderate pleural effusion . 2 . Tiny left apical pneumothorax . No definite pneumomediastinum .