Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient has had prior median sternotomy and CABG . There is asymmetric opacity in the right lung diffusely . There is also left basal opacity and a small left effusion . The heart and hila are enlarged . No pneumothorax .
    OUTPUT:
    
Asymmetric opacification of the right lung could represent asymmetric pulmonary edema with right upper lobe opacity could be superimposed infection / aspiration in the appropriate clinical setting .