Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is mild cardiomegaly which is unchanged . The mediastinal silhouette is normal . There is a small opacification of the right lower lobe which may represent residual pneumonia seen on previous studies though the right upper lobe has completely resolved . There are no pleural effusions or pneumothorax .
    OUTPUT:
    
Small region of opacification the right lower lobe which may represent residual of pneumonia .