Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is moderate cardiomegaly which is unchanged compared to the prior exam . The mediastinal and hilar contours are unremarkable . The pulmonary vascularity is not engorged . Patchy ill - defined opacity within the right lung base could reflect developing infection or atelectasis . No focal consolidation , pleural effusion or pneumothorax is identified .
    OUTPUT:
    
Patchy opacity within the right lung base which is nonspecific but may reflect an area of infection or atelectasis .