Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperinflated and demonstrate mild interstitial changes raises which raises concern for emphysema . No focal opacity , pulmonary edema , pleural effusion or pneumothorax . The cardiac and mediastinal contours are normal . There is no free air beneath the hemidiaphragms .
    OUTPUT:
    
No acute intrathoracic process . Hyperinflated lungs with associated mild interstitial changes is concerning for emphysema . No intra-abdominal free air .