Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparison with radiographs from ___ , allowing for differences in technique , there has been interval removal of bilateral bronchial stents . There is no pneumothorax or pneumomediastinum . Lung volumes are low , accentuating the cardiac silhouette and resulting in crowding of the bronchovascular structures . There is no focal consolidation , effusion or pulmonary edema . Mediastinal and hilar contours are unchanged . Heart size is normal .
    OUTPUT:
    
No pneumothorax or pneumomediastinum .