Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: CC is status post median sternotomy and CABG . Severe cardiomegaly is unchanged . There is mild to moderate pulmonary edema , as seen previously . The mediastinal and hilar contours are similar with atherosclerotic calcifications noted diffusely in the descending thoracic aorta . Small bilateral pleural effusions have decreased in size compared to the prior study . Patchy atelectasis is noted in the lung bases . No pneumothorax is identified . There are moderate degenerative changes in the thoracic spine .
    OUTPUT:
    
Mild to moderate pulmonary edema , as seen previously , with severe cardiomegaly . Trace bilateral pleural effusions , decreased in size in the interval .