Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest provided . Lungs appear hyperinflated and lucent consistent with emphysema . There is subtle predominately linear opacity in the right lower lung which may represent atelectasis and / or pneumonia . No large effusion or pneumothorax . No overt evidence for pneumonia . Cardiomediastinal silhouette is stable . Bony structures appear intact .
    OUTPUT:
    
Emphysema with subtle right lower lung opacity which could represent atelectasis and / or pneumonia .