Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Normal cardiomediastinal and hilar contours . Normal pleural surfaces . Clear , mildly hyperinflated lungs . No acute pneumonia , pleural effusion , pneumothorax , or pulmonary nodules . No definite osseous or soft tissue abnormalities .
    OUTPUT:
    
Emphysema . No acute cardiopulmonary radiographic abnormality . If clinical suspicion for lung cancer persists , consider a chest CT .