Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well - expanded and clear . No focal opacity . No pleural effusion or pneumothorax . Heart size , mediastinal contour , and hila are unremarkable . Limited assessment of the upper abdomen is unremarkable and visualized osseous structures are within normal limits .
    OUTPUT:
    
Normal chest radiograph . No cardiomegaly .