Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . There is mild bibasilar atelectasis . There is no focal consolidation , effusion , or pneumothorax . Mediastinal and hilar contours are normal . Heart size is normal . Compression deformity in the midthoracic spine is unchanged .
    OUTPUT:
    
No evidence of pneumonia .