Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval placement of a left chest tube with pigtail projecting over the left apex . Previously demonstrated large left - sided pneumothorax has resolved . There is a small left pleural effusion . Previously noted rightward shift of mediastinal structures has also resolved . Heart size is normal . Mediastinal and hilar contours are unremarkable . Pulmonary vasculature is normal . Minimal atelectasis is seen in the left lung base . Right lung is clear . There are no acute osseous abnormalities . Minimal amount of subcutaneous emphysema is seen along the left lateral chest wall .
    OUTPUT:
    
Interval resolution of previously noted large left pneumothorax status post chest tube placement . Small left pleural effusion and minor left basilar atelectasis .