Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Interval improvement in mild bibasilar atelectasis . Small left - sided pleural effusion is new . There is a trace amount of fluid tracking in the right minor fissure . No evidence of pulmonary edema . The degree of cardiomegaly is slightly more than expected after surgery . Median sternotomy wires are intact .
    OUTPUT:
    
Slightly more than expected cardiomegaly after surgery . Follow - up radiographs are recommended . Small left pleural effusion is new .