Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi upright chest radiograph ___ at 13 :38 is submitted .
    OUTPUT:
    
Lungs remain hyperinflated suggestive of underlying emphysema . The left basilar pigtail pleural catheter remains in place . Overall , loculated left apical , medial and basilar pneumothorax has decreased in overall size . The previously seen linear lucency at the right base is no longer apparent although there may be a very tiny right apical pneumothorax . There is improved aeration at the left base with residual patchy atelectasis . Right lung is grossly clear . Stable linear lucency adjacent to the descending aorta is suggestive of pneumomediastinum . Interval intubation with the endotracheal tube having its tip approximately 4 .5 cm above the carina . The right internal jugular central line and nasogastric tube are unchanged in position . A biliary stent is incompletely visualized .