Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are normally expanded . Small focal opacity along the left lateral heart border without obscuration of the heart border may reflect superimposition of normal structures . Heart size is decreased now top normal . The mediastinal and hilar contours are normal . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Small focal opacity along the left lateral heart border may reflect superimposition of normal structures . Pneumonia is possible but thought less likely