Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate normal lung volumes . Right lung base opacities are slightly more conspicuous since prior , projecting over the spine on the lateral view . There is no pleural effusion , focal consolidation or pneumothorax . Hilar and mediastinal silhouettes are unchanged . Heart size is normal . There is no pulmonary edema . Partially imaged upper abdominal visceral organs are unremarkable .
    OUTPUT:
    
Right lung base opacities , slightly more conspicuous since ___ , may represent atelectasis or infection in the appropriate clinical setting .