Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA frontal and lateral chest radiograph demonstrates interval removal of left - sided chest tube with no pneumothorax identified . There is interval development of atelectasis in the right middle lobe as demonstrated by triangular opacity . The left lung is grossly clear with basilar atelectasis . There is no pleural effusion . Cardiomediastinal and hilar contours are stable .
    OUTPUT:
    
No pneumothorax after chest tube removal .