Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest were provided . Chronic elevation of the right hemidiaphragm is again noted . There is mild bibasilar atelectasis . No definite signs of pneumonia or overt CHF . The overall cardiomediastinal silhouette appears stable . No pneumothorax . Bony structures intact . Degenerative changes in the thoracic spine are stable .
    OUTPUT:
    
Mild bibasilar atelectasis and stable elevation of the right hemidiaphragm . No definite signs of pneumonia .