Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperinflated and there is flattening of the diaphragms bilaterally . Heart size is normal . There is no pneumothorax or pleural effusion . A question opacity at the left lung base likely represents overlying structures , however a focal parenchymal opacity can not be excluded . Osseous structures are unremarkable .
    OUTPUT:
    
Very low likelihood for infection at the left lung base . If indicated , shallow oblique views could be obtained .