Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size is normal . The mediastinal contours are unremarkable . There is mild fullness of the right hilum . Patchy bibasilar airspace opacities may reflect areas of atelectasis but infection is not excluded . No pleural effusion or pneumothorax is seen . There are no acute osseous abnormalities .
    OUTPUT:
    
Patchy airspace opacities in both lung bases may reflect atelectasis but infection is not excluded . Fullness of the right hilum for which comparison with previous radiographs is recommended . If none are available , consider CT with contrast to exclude an underlying mass .