Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: ETT in standard position . Right internal jugular venous approach central venous catheter tip projects over the expected region of the upper SVC , unchanged . Left internal jugular venous catheter tip projects over the left apex , unchanged . Median sternotomy wires and replaced aortic valve appear intact . Slight interval increase in left lower lobe opacity , likely atelectasis . Persistent , bilateral layering small pleural effusions . No pneumothorax . Cardiomediastinal silhouette is unchanged . No edema .
    OUTPUT:
    
Persistent small bilateral pleural effusions with associated increased left lower lobe atelectasis .