Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . The lungs remain hyperinflated , flattening of the diaphragms , suggesting chronic obstructive pulmonary disease . Prominence of interstitial markings is seen in the right perihilar region , similar to prior , most likely relates to underlying pulmonary emphysema . No focal consolidation , pleural effusion , or evidence of pneumothorax is seen . The cardiac and mediastinal silhouettes are stable and unremarkable . Hilar contours are also stable .
    OUTPUT:
    
COPD . No acute cardiopulmonary process .