Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Extremely low lung volumes are seen with relative elevation of the left hemidiaphragm . Left basilar opacity may be subsequent to atelectasis . The lungs are otherwise grossly clear . Cardiomediastinal silhouette has not changed given lower lung volumes . No acute osseous abnormality . Left humeral head hardware is identified .
    OUTPUT:
    
Extremely low lung volumes with likely left basilar atelectasis .