Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP semi-upright view of the chest were reviewed and compared to the prior studies . A pigtail catheter within the left chest is unchanged in position . Opacity around the left mediastinum and loss of the left mediastinal contours is highly concerning for left lung atelectasis and / or a large left pneumothorax . Opacities in the right lung have decreased , however , right low lung atelectasis persists . A right - sided internal jugular line ends in the low superior vena cava . Evaluation of the cardiac and mediastinal contour is severely limited ; however , they appear grossly unchanged . Again left rib fractures are noted . Subcutaneous air in the left hemithorax is slightly decreased .
    OUTPUT:
    
1 . Increased opacity in the left mediastinal region is highly suspicious for left lung collapse and / or large left pneumothorax . 2 . Improvement of right lung aeration and decrease in right lung opacities .