Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate normal lung volumes . Right middle and lower lobe opacities are better seen on the CT exam of the same date . There is no pleural effusion or pneumothorax . Hilar and mediastinal silhouettes are unremarkable . Heart size is normal .
    OUTPUT:
    
Right middle and lower lobe opacities , better demonstrated on CT exam of the same date , which may represent aspiration or infection in the appropriate clinical setting .