Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are expanded and clear . Slight flattening of the hemidiaphragms and widening of the AP diameter is better appreciated in the lateral view , overall unchanged from the prior exam but could reflect chronic pulmonary disease . No focal consolidation , pleural effusion , pulmonary edema , or pneumothorax . The heart size is normal . The mediastinum is not widened . The hila are within normal limits . Calcifications of the aortic knob are overall unchanged .
    OUTPUT:
    
1 . No pneumonia . 2 . Chronic pulmonary disease .