Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with the prior film , a left pigtail type catheter has been placed , partially obscured by the indwelling catheter , but otherwise grossly unremarkable . The pneumothorax is considerably decreased in size . A small residual pneumothorax is likely present , with faint lucency seen at the left lung apex . This may also account for lucency medially , in the region of the aortic knob . There are small bilateral effusions , with bibasilar atelectasis . No right - sided pneumothorax is detected . The cardiomediastinal silhouette is grossly unchanged and remains midline . The tip of the indwelling catheter overlies the mid / distal SVC .
    OUTPUT:
    
Left - sided pneumothorax has decreased in size compared with earlier the same day . Suspect faint residua at the lung apex and along the medial aspect of the lung . ( This impression differs slightly from the resident wet reading , but is addressed on report from a subsequent radiograph from ___ at 10 : 25 , which was issued prior to the resident wet reading . )