Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest were obtained . The patient is rotated to the right . The patient is status post median sternotomy . There is slight blunting of the left posterior costophrenic angle which may be due to a trace pleural effusion . There is perihilar opacity , right greater than left which could be due to asymmetric edema or infection . No pneumothorax seen . The cardiac silhouette is top normal . The aorta is somewhat tortuous .
    OUTPUT:
    
Left greater than right perihilar opacities could be due to asymmetric edema or infection .