Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to exam approximately 10 hours prior , there is improvement of the right perihilar opacity . However , the right lower lobe opacity remains , concerning for aspiration or pneumonia . Lingular atelectasis is stable . The cardiomediastinal silhouette is unchanged . There is no pulmonary edema , pleural effusion , or pneumothorax . Monitoring and support lines are unchanged and appropriate in positioning .
    OUTPUT:
    
Persistent right lower lobe opacity , concerning for aspiration or pneumonia .