Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable frontal AP view of the chest ___ at 11 :11 is submitted .
    OUTPUT:
    
There is stable perihilar vascular congestion with no overt pulmonary edema . Patchy bibasilar opacities are now seen which could reflect pneumonia , although atelectasis could also have this appearance . Status post median sternotomy with stable postoperative cardiac enlargement and stable mediastinal contours . No large effusions . No pneumothorax .