Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Pulmonary vascular congestion and mild pulmonary edema have improved compared with the prior study . Marked cardiomegaly is persistent but likely slightly improved as well . Bibasilar opacities likely represent atelectasis , however superimposed consolidation can not be excluded . Tracheostomy tube is unchanged . Left PICC terminates at the origin of the SVC .
    OUTPUT:
    
1 . Slight interval improvement in pulmonary vascular congestion and pulmonary edema . 2 . Persistent bibasilar opacities may represent atelectasis or consolidation .