Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided demonstrate low lung volumes . Bronchovascular crowding likely accounts for the relative opacity seen at the lung bases , mostly on the frontal view . No effusion or pneumothorax . Cardiomediastinal silhouette appears stable . Bony structures are intact .
    OUTPUT:
    
Limited , negative .