Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy with multiple intact appearing sternal wires . Mediastinal surgical clips are compatible with prior CABG surgery . The cardiac silhouette is mildly enlarged , increased from the prior study of ___ , which may be in part related to AP technique . The mediastinal and hilar contours are within normal limits . There is minimal calcification of the aortic knob . The inspiratory lung volumes are appropriate . Likely bibasilar atelectasis , early infection not excluded in appropriate clinical setting . No large pleural effusion or pneumothorax is appreciated . Healed right rib fractures are noted .
    OUTPUT:
    
Cardiac silhouette increased in size compared to prior study from ___ . Likely bibasilar atelectasis , early infection not excluded in appropriate clinical setting .