Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided demonstrate a pectus excavatum deformity , which likely accounts for the subtle opacity at the right heart border . The lungs are clear . No pneumothorax or pleural effusion . Cardiomediastinal silhouette is normal . The imaged osseous structures are intact . No displaced rib fractures are seen . No free air below the right hemidiaphragm .
    OUTPUT:
    
No acute findings in the chest .