Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiograph low lung volumes . Cardiomediastinal and hilar contours are stable relative to prior examination . Heart is upper limits of normal in size , exaggerated by low lung volumes . Lungs are clear without a focal consolidation . There is no pleural effusion , pneumothorax , or evidence of pulmonary edema .
    OUTPUT:
    
No evidence of pneumonia . Persistent mildly enlarged heart .