Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Mediastinal and hilar contours are unchanged . Small hiatal hernia is re - demonstrated . The pulmonary vasculature is normal . The lungs remain hyperinflated . There has been interval improvement in patchy ill - defined opacity within the left lower lobe compared to the prior radiograph . Additional minimal patchy opacity is seen within the right lower lobe , as noted on the CT . No pleural effusion or pneumothorax is detected .
    OUTPUT:
    
Slight interval improvement in the left lower lobe pneumonia . Additional patchy opacity within the right lower lobe is also concerning for an area of infection or aspiration .