Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and ascending thoracic aortic graft placement . Cardiac silhouette size remains mildly enlarged . Mediastinal contour is similar . New perihilar ill - defined alveolar opacities are demonstrated . No pleural effusion or pneumothorax is identified . No acute osseous abnormalities seen .
    OUTPUT:
    
New bilateral perihilar alveolar opacities , most likely reflective of moderate to severe pulmonary edema . Pulmonary hemorrhage is not excluded .