Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The hilar and mediastinal contours are stable . The mild bilateral pulmonary edema is stable compared to the prior exam . There are no pleural effusions , or evidence of a pneumothorax . There appears to be an interval increase in the left lower lobe atelectasis , however no other new focal consolidations are seen . Again seen are post-surgical changes related to the sternotomy wires and CABG .
    OUTPUT:
    
1 . No evidence of subdiaphragmatic free air , however , this is not an upright film and therefore has a lower sensitivity for abdominal free-air . If there is further clinical concern , an upright or decubitus view of the abdomen would be more sensitive . 2 . Unchanged mild bilateral pulmonary edema .