Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to the prior exam there has been interval increase in the amount of hazy opacity in both lower lungs . While some of this is due to volume loss , an early infiltrate in either lower lobe can not be totally excluded . There is mild pulmonary vascular redistribution . The heart is mildly enlarged . Left IJ line with tip in the mid SVC is unchanged .
    OUTPUT:
    
Bilateral lower lobe opacities could be due to volume loss versus infiltrate