Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are relatively low lung volumes . Patchy bibasilar opacities are seen , pneumonia is not excluded in the appropriate clinical setting . Differential diagnosis includes pneumonia and / or atelectasis . No pleural effusion or pneumothorax is seen . The cardiac silhouette is top - normal . Mediastinal contours are unremarkable .
    OUTPUT:
    
Low lung volumes . Patchy bibasilar opacities could relate to pneumonia and / or atelectasis .