Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A pigtail catheter is noted projecting over the right mid lung field laterally . There has been marked interval decrease in size of the previously demonstrated right pneumothorax , with only a small residual apical pneumothorax demonstrated . Previously noted leftward shift of mediastinal structures is also improved . The cardiac and mediastinal contours are normal . Lungs are clear without focal consolidation . No pleural effusion is demonstrated .
    OUTPUT:
    
Status post right chest tube placement with marked interval reduction in size of the right pneumothorax , with only a residual small apical pneumothorax now seen . Previously noted leftward shift of mediastinal structures has resolved .