Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The mediastinal and hilar contours appear within normal limits . The pulmonary architecture appears somewhat irregular , which may reflect underlying pulmonary obstructive disease . Streaky opacities in each costophrenic sulcus suggest minor scarring or atelectasis . Otherwise , the lungs appear clear . There are no pleural effusions or pneumothorax . An expanded anteroposterior dimension of the chest suggests mild hyperinflation . Small osteophytes are noted along the thoracic spine .
    OUTPUT:
    
Findings which may suggest obstructive pulmonary disease , but no evidence for acute process .