Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal contours are normal . Small bilateral effusions are grossly unchanged , probably loculated on the left side . Stable left perihilar opacities are consistent with atelectasis . Left lower lobe atelectasis has improved . There is no pneumothorax . Sternal wires are aligned . Patient is status post CABG . Degenerative changes in the thoracic spine are again noted . .
    OUTPUT:
    
No acute cardiopulmonary abnormalities stable pleural effusions . No evident pneumothorax . .