Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A moderate left pleural effusion is unchanged . A small right pleural effusion is improved since ___ . There is no pneumothorax . The cardiac and mediastinal contours remain stable . Moderate calcifications are again seen across the aortic arch . A left - sided pacemaker projects leads into the right atrium and ventricle .
    OUTPUT:
    
Unchanged moderate left pleural effusion . Interval decrease in size of a small right pleural effusion . The cardiac contour is unchanged since ___ .