Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Following thoracocentesis and pigtail catheter placement positioned at the right lung base , a large right pleural effusion has decreased but still at least moderate amount of right pleural fluid accompanying complete collapse of the right lower lobe and possibly at least partial collapse of the right upper lobe is persisting . An ill - defined opacity in the left suprahilar region which was new on ___ radiograph is likely an aspiration pneumonia . Left lower lung is clear . Mild mediastinal shift to the left side owing to the right pleural effusion still persists , but better since yesterday . There is no demonstrable pneumothorax .
    OUTPUT:
    
Following thoracocentesis and right pigtail catheter placement , large right pleural effusion has decreased , but still at least moderate pleural effusion persists and accompanies complete collapse of the right lower lobe and possibly a partial collapse of the right upper lobe . Ill - defined left suprahilar opacity which was new on ___ is likely aspiration pneumonia .