Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperexpanded with areas increased lucency suggestive of emphysematous changes . Interstitial markings peripherally likely represent chronic interstitial changes . A small left pleural effusion is stable from ___ . Mediastinal contours and top - normal heart size are unchanged . Midthoracic anterior vertebral body compression deformities are stable .
    OUTPUT:
    
1 . No evidence of pneumonia . 2 . Small left pleural effusion stable since ___ .