Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post CABG as well as median sternotomy . Aortic knob is calcified . Left lower lobe atelectasis is stable . Cardiac size is normal . Hilar contours are unremarkable . No pleural effusion , pneumothorax , evidence of pneumonia .
    OUTPUT:
    
No acute cardiopulmonary process .