Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and CABG . Heart size is mildly enlarged but unchanged . The mediastinal and hilar contours are relatively stable . There is mild pulmonary edema . Patchy opacities in the lung bases may be a reflection of dependent pulmonary edema , though atelectasis is not excluded . No pleural effusion or pneumothorax is present . There are no acute osseous abnormalities .
    OUTPUT:
    
Mild pulmonary edema . Patchy opacities in the lung bases may reflect dependent pulmonary edema or atelectasis . ___ , MD ___=___