Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . A single - lead left - sided AICD is again seen with lead extending to the expected position of the right ventricle . Patient is status post median sternotomy and cardiac valve replacement . Small right pleural effusion with overlying atelectasis persists . There is also again right mid lung linear atelectasis / scarring , similar to slightly increased as compared to prior . Left lung is clear . The cardiac silhouette remains enlarged . Mediastinal contours are stable .
    OUTPUT:
    
Small right pleural effusion with overlying atelectasis . Right mid lung opacity appears slightly increased as compared to the prior study and may represent a combination of atelectasis and evolving consolidation .