Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac , mediastinal and hilar contours are within normal limits . Lungs are clear . Blunting of left costophrenic angle is chronic , and likely relates to chronic pleural thickening . Lungs are hyperinflated with mild emphysematous changes again noted at the lung apices . No pneumothorax or pleural effusion is detected , and there is no new focal consolidation . Mild degenerative changes are seen throughout the thoracic spine .
    OUTPUT:
    
No significant interval change from prior with chronic left costophrenic angle blunting likely reflecting pleural thickening . No pneumonia or metastatic disease identified . Emphysema .