Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size remains moderately enlarged . Aortic knob atherosclerotic calcifications are again demonstrated . The mediastinal and hilar contours are unchanged . Pulmonary vasculature is not engorged . Streaky and patchy opacities are again noted bilaterally , most pronounced within the mid lung fields and lung bases , not substantially changed from the previous radiograph , and likely chronic . No new areas of focal consolidation are demonstrated . Blunting of the costophrenic angles bilaterally may indicate chronic pleural thickening or trace bilateral pleural effusions . No pneumothorax is identified .
    OUTPUT:
    
Patchy and streaky opacities in both lungs , most pronounced in the mid lung fields and lung bases , findings which appear chronic . No new areas of focal consolidation demonstrated . Small bilateral pleural effusions versus pleural thickening .