Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: THERE IS SLIGHT BLUNTING OF THE POSTERIOR COSTOPHRENIC ANGLES MAY BE DUE TO TRACE PLEURAL EFFUSIONS . NO LARGE PLEURAL EFFUSION IS SEEN . THERE IS NO DEFINITE FOCAL CONSOLIDATION . NO PNEUMOTHORAX IS SEEN . PATIENT IS STATUS POST MEDIAN STERNOTOMY AND CABG . THE CARDIAC SILHOUETTE IS TOP - NORMAL TO MILDLY ENLARGED . NO PULMONARY EDEMA .
    OUTPUT:
    
Slight blunting of the posterior costophrenic angles may be due to trace pleural effusions . No large full effusion . No definite focal consolidation . Top - normal to mildly enlarged cardiac silhouette . No pulmonary edema .