Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest are provided . The lung volumes are low with bronchovascular crowding and atelectasis noted in the lower lungs . The cardiomediastinal silhouette is stable . No convincing signs of pneumonia , effusion or pneumothorax . Bony structures appear intact .
    OUTPUT:
    
Limited , negative . Please refer to subsequent CTA chest for further details .