Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Subtle streaky retrocardiac opacity may represent pneumonia in the correct clinical setting . Otherwise the lungs are clear . No effusion or pneumothorax . The cardiomediastinal silhouette is normal . Imaged osseous structures are intact . No free air below the right hemidiaphragm is seen .
    OUTPUT:
    
Streaky retrocardiac opacity , possibly indicative of pneumonia in the correct clinical setting .