Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy and CABG . Heart size is mildly enlarged . The aorta is diffusely calcified . Mediastinal and hilar contours are unremarkable . Increased interstitial opacities bilaterally are compatible with mild interstitial pulmonary edema . Small bilateral pleural effusions are present , larger on the left . There is atelectasis in the left lung base . No pneumothorax is present . There are moderate multilevel degenerative changes present in the thoracic spine .
    OUTPUT:
    
Mild interstitial pulmonary edema and small bilateral pleural effusions , larger on the left .