Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . The heart is top - normal in size . The lungs are clear bilaterally . There is no pleural effusion or pneumothorax . Mediastinal contour is normal . No signs pneumomediastinum . Bony structures are intact .
    OUTPUT:
    
Top - normal heart size . Otherwise unremarkable .