Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate low lung volumes and a heart which is top - normal in size . Other than mild bibasilar atelectasis , the lungs are clear . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Low lung volumes and bibasilar atelectasis ; otherwise normal chest radiograph .