Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were obtained . Heart is normal size , and cardiomediastinal silhouette is unchanged . Lungs are well expanded . There is subtle increased density as compared to the prior examination , best seen on the lateral radiograph superimposed over the spine along the major fissure . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Subtle increased opacity in a lower lobe , clinically correlate .