Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The mediastinal and hilar contours are unremarkable . The pulmonary vascular is normal . Focal patchy opacity within the right lower lobe is unchanged compared to the prior study . No new areas of focal consolidation are demonstrated . No pleural effusion or pneumothorax is present . There is no acute osseous abnormality .
    OUTPUT:
    
Persistent ill - defined opacity within the right lower lobe . This finding should be further investigated with a chest CT given its continued presence .