Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate normal lung volumes . Bibasilar opacities are noted , right greater than left . Hilar and mediastinal silhouettes are unchanged . Heart size top normal . There is no pulmonary edema . Partially imaged upper abdomen is unremarkable . Moderate degenerative joint changes of the thoracic spine are present .
    OUTPUT:
    
Bibasilar opacities , right greater than left , may represent atelectasis or infection in the appropriate clinical setting .