Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since chest radiographs obtained ___ , no significant changes are appreciated . There is a focus of linear atelectasis in the right lower lung . Lungs are otherwise fully expanded and clear . Heart size is normal . Cardiomediastinal and hilar silhouettes and pleural surfaces are normal . Unchanged straightening of the thoracic spine .
    OUTPUT:
    
No radiographic evidence of pneumonia or other significant cardiopulmonary abnormalities .