Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest provided . The lungs appear hyperinflated with left mid lung opacity which is compatible with atelectasis better assessed on the CTA performed concurrently . Emphysematous changes are noted . No large effusion or pneumothorax . Cardiomediastinal silhouette appears stable . Bony structures are intact .
    OUTPUT:
    
Emphysema , left mid lung atelectasis . Please refer to subsequent CTA chest for further details .