Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is persistent opacity at the right base which is essentially unchanged . No new airspace opacity is detected . The lungs are normally expanded . The cardiomediastinal silhouette and hilar contours are normal . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Essentially unchanged opacity at the right base reflecting unresolved pneumonia .