Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes have slightly improved compared to the prior study performed several hours earlier . There is mild pulmonary vascular congestion without overt pulmonary edema . Bibasilar opacities most likely represent atelectasis . No pleural effusion or pneumothorax . Mild cardiomegaly . Multiple old left - sided rib fractures . Tip of the right IJ terminates in the mid SVC .
    OUTPUT:
    
Mild pulmonary vascular congestion , without overt pulmonary edema .