Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest are compared to previous exam from ___ . The lungs are clear . There is trace blunting of posterior costophrenic angles , which may represent small effusions . Cardiac silhouette is enlarged but stable in configuration . No pulmonary vascular congestion . Post - CABG changes are noted and dual - lead pacing device which are stable in position .
    OUTPUT:
    
Trace pleural effusions . Otherwise , no significant change since prior without definite acute cardiopulmonary process .