Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest are obtained . The patient is status post median sternotomy and CABG . There are relatively low lung volumes . There is persistent elevation of the right hemidiaphragm with overlying patchy right base opacity may relate to atelectasis , although in the appropriate clinical setting , early consolidation due to infection is not excluded . No large pleural effusion or pneumothorax is seen . The cardiac and mediastinal silhouettes are stable .
    OUTPUT:
    
Patchy right base opacity overlying persistently elevated right hemidiaphragm may be due to atelectasis , although in the appropriate clinical setting , early consolidation can not be excluded .