Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are clear . There is no focal consolidation , effusion , or pneumothorax . There is bronchial wall thickening in the left lower lobe , suggestive of bronchitis . Old bilateral rib fractures with associated scarring in the left and right mid-zones are again seen . Mediastinal and hilar contours are normal . Heart size is borderline enlarged , with associated prominence of the pulmonary vascularity but no overt pulmonary edema
    OUTPUT:
    
No evidence of pneumonia . Bronchial wall thickening in the lower lobes , suggestive of bronchitis .