Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: An AP view of the chest was obtained . There is mild cardiomegaly . The mediastinal and hilar contours are unremarkable . There is no pleural effusion or pneumothorax . There are low lung volumes with bibasilar opacities consistent with atelectasis . There is no focal consolidation concerning for pneumonia .
    OUTPUT:
    
Low lung volume and bibasilar atelectasis .