Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since the prior study there is an improvement in aeration of the lungs with slight improvement in heterogeneous bibasilar opacities . Moderate cardiomegaly persists and there is increased opacification in the right lower lobe . Chain sutures are again noted in the right upper lung . There is no evidence of pleural effusion or pneumothorax . Mild central vascular congestion is noted .
    OUTPUT:
    
Interval improvement in appearance of pulmonary edema from ___ , now only mild vascular congestion , with large region of opacification of the right lower lung which could be secondary to infection .