Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been continued interval improvement in the bilateral opacities in the right upper and left mid to lower lung . On the lateral , however there is a new opacity projecting over the heart potentially localizing to the right middle lobe . Effusions have also decreased in size . The cardiomediastinal silhouette is within normal limits . Healed posterior left rib fractures are again noted .
    OUTPUT:
    
Continued interval improvement of the bilateral parenchymal opacities and essentially resolved bilateral pleural effusions . More conspicuous opacity projecting over the heart on the lateral view potentially within the right middle lobe may be atelectasis although infection is not excluded .