Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . There is slight blunting of left costophrenic angle suggesting a small left pleural effusion . Minimal to no right pleural effusion is seen . A subtle left base retrocardiac streaky opacity is likely due to atelectasis without definite focal consolidation . There is no pneumothorax . No overt pulmonary edema is seen . The patient is status post median sternotomy and CABG , with the cardiac silhouette top normal to mildly enlarged and the aorta calcified and tortuous .
    OUTPUT:
    
Trace left pleural effusion with overlying left basilar atelectasis .