Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and CABG . The heart remains moderate to severely enlarged . The mediastinal contours are stable with aortic knob calcifications visualized . There is consolidative opacity within the right lung , most pronounced within the right upper lobe . Additionally , ill - defined hazy opacity is noted within the left perihilar region . There is no pleural effusion or pneumothorax visualized . Mild degenerative changes are seen within the thoracic spine .
    OUTPUT:
    
1 . Consolidative opacity within the right upper lobe is concerning for pneumonia . 2 . Hazy opacity within the right lung base as well as within the left perihilar region may reflect superimposed pulmonary edema , though infection within the right lung base also is not excluded .