Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The hilar and mediastinal contours are normal . The lungs are clear without evidence of focal consolidations concerning for pneumonia . Hyperinflated appearance of the lungs is unchanged compared to the prior exam . There is no pleural effusion or pneumothorax . The visualized osseous structures are unremarkable .
    OUTPUT:
    
No acute intrathoracic abnormalities identified . Hyperinflated appearance of the lungs , unchanged compared to the prior exam , suggesting the possibility of COPD in the appropriate clinical setting .