Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left pectoral pacemaker lead terminates in right ventricle . The cardiac device overlying the cardiac apex is in unchanged position . Sternotomy wires are intact . Mild pulmonary edema is improved . Right lung base pleural scarring is unchanged . Pleural fluid between the right minor fissure is smaller . Cardiomediastinal silhouette is stable .
    OUTPUT:
    
Small right pleural effusion is smaller than ___ .