Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is increased opacity of both bases , right greater than left . While some of this could be due to volume loss aspiration or infectious pneumonia can not be excluded the remainder of the lungs are clear . The cardiac and mediastinal silhouettes are normal . There is no effusion .
    OUTPUT:
    
Volume loss versus infiltrate in the lower lobes right greater