Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left internal jugular central venous line is unchanged in position , terminating in the mid SVC . Heart size is stable . Heterogeneous opacification in the right infrahilar region has slightly increased in density since the prior radiograph , and could represent developing infection . No pleural effusion or pneumothorax . Emphysema is moderate .
    OUTPUT:
    
Interval increase in density of heterogeneous right infrahilar opacity , possibly representing early infection .