Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The rounded opacity at the right lung base has improved . Although improved , there is persistent patchy opacification . The lungs are otherwise clear . Heart size is stable . The mediastinal and hilar contours are stable . The pulmonary vasculature is normal . No pleural effusion or pneumothorax is seen .
    OUTPUT:
    
Improvement in right basilar rounded opacity , with persistent patchy opacification likely representing improved round pneumonia or atelectasis .