Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral radiographs of the chest depict stable postoperative appearance of the heart and mediastinum . Small bilateral pleural effusions persist , with possible minimal improvement in the left - sided effusion and left lower lobe atelectasis , although some of this change may be different positioning of the patient . The lungs are otherwise clear and there is no pneumothorax . Pulmonary vascularity is normal , without evidence of interstitial edema . The sternotomy cerclage wires are intact .
    OUTPUT:
    
Persistent small bilateral pleural effusions and bibasilar atelectasis , with some possible improvement on the left .