Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate to severe cardiomegaly is relatively unchanged compared to the prior study . A single lead pacer is again noted . There is a small to moderate right pleural effusion . A trace left pleural effusion is better seen on the prior CT torso performed 3 hours prior . No pneumothorax is identified . The lungs are clear . There are median sternotomy wires and mediastinal clips .
    OUTPUT:
    
Small to moderate right pleural effusion . A trace left pleural effusion is better seen on the CT torso performed 3 hours prior . No focal opacity concerning for contusion .