Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest . There are bilateral band - like opacities extending towards the periphery are unchanged from most recent study and likely represents scarring . No pericardial or pleural effusion . There are no new opacities . A bulge in the right lower mediastinum represents left atrial enlargement . No evidence of pneumonia . No pulmonary vascular congestion .
    OUTPUT:
    
1 . Unchanged band - like opacities representing scarring . 2 . Left atrial enlargement .