Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The lung volumes are low . There is a patchy left basilar opacity that appears unchanged and is likely due to minor atelectasis or scarring , probably within the lingula . The lungs appear otherwise clear . There are no pleural effusions or pneumothorax . Bony structures are unremarkable . There has been no significant change aside from removal of a venous catheter .
    OUTPUT:
    
No evidence of acute disease .