Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperinflated . The cardiac , mediastinal and hilar contours are unchanged . Pulmonary vascularity is normal . There is minimal ill - defined patchy opacity within the left lung base which appears relatively unchanged compared to prior study , and may reflect residual scarring . No new focal consolidation is identified . There is no pleural effusion or pneumothorax . No acute osseous abnormality is seen .
    OUTPUT:
    
No significant interval change from prior . Minimal ill - defined patchy opacity in left lung base , which may reflect scarring .