Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post previous median sternotomy and coronary artery bypass surgery with stable postoperative appearance of the sternotomy wires . Heart is upper limits of normal in size . Bibasilar opacities have improved , with minimal residual basilar atelectasis remaining . Small bilateral pleural effusions have also decreased in size .
    OUTPUT:
    
Resolving bibasilar atelectasis and improving small pleural effusions .