Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate low lung volumes , which accentuate bronchovascular markings . There is no pleural effusion or pneumothorax . Hilar and mediastinal silhouettes are unremarkable . Heart size is normal . There is no pulmonary edema . Right lung base opacities are slightly more conspicuous since prior .
    OUTPUT:
    
Low lung volumes . Right lung opacity may represent atelectasis , aspiration or infection in the appropriate clinical setting .