Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are relatively low lung volumes , which accentuate the bronchovascular markings . Given this , there may be a subtle right base opacity which could be due to consolidation versus atelectasis . The left lung is clear . There is no pleural effusion or pneumothorax . The cardiac silhouette is not enlarged .
    OUTPUT:
    
Relatively low lung volumes . Subtle right lower lobe opacity could be due to consolidation versus atelectasis . Underlying pulmonary infarct can not be excluded on this study . No evidence of pneumothorax .