Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac size is top normal . The lungs are clear . There is no pneumothorax or pleural effusion . Minimal but improved bibasilar atelectasis . Mild scoliosis . Partially visualized thoracic fusion hardware appears intact .
    OUTPUT:
    
Minimal but improved bibasilar atelectasis compared to ___ . No evidence of pneumonia .