Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are underinflated with streaky bibasilar atelectasis . There is no focal pneumonia , pleural effusion , or pneumothorax . No evidence of pneumoperitoneum on this limited portable upright chest radiograph .
    OUTPUT:
    
Underinflated lungs with no evidence of acute cardiopulmonary process .