Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . No pneumothorax . No pleural abnormalities . The hila and pulmonary vasculatures are normal . The heart size is top normal but exaggerated by decreased lung volume . The mediastinum is normal . No fractures .
    OUTPUT:
    
1 . No pneumothorax . 2 . Top - normal heart size exaggerated by decreased lung volume .