Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperinflated . The previously seen opacity in the right medial lung base has decreased from prior exam . No new focus of opacity is seen . There is no pleural effusion or pneumothorax . The cardiomediastinal silhouette is unremarkable . Old rib fractures are unchanged from prior exam .
    OUTPUT:
    
No pneumothorax or appreciable pleural effusion . If there is concern for acute rib or spine fractures , dedicated views of the points of tenderness should be performed . Hyperinflation consistent with emphysema . Interval decrease in opacity in the right medial lung base . Lateral view is recommended to confirm whether previous pneumonia has substantially cleared .