Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear unchanged . There is similar mild relative elevation of the right hemidiaphragm . Streaky right mid and lateral left lower lung opacities appear unchanged and suggest background scarring . The lateral view also depicts similar retrocardiac opacity probably in the left lower lobe , which is also streaky in configuration and more suggestive of atelectasis than pneumonia . These findings are similar to the prior study . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No definite change in left basilar opacities , streaky in morphology and suggestive of atelectasis based on longer chronicity .