Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable upright chest radiograph was obtained . Linear atelectasis at the right base is more discrete compared to prior exam . No consolidation , effusion or pneumothorax is present . Moderate cardiomegaly is stable . A tiny right effusion is noted . Surgical clips and sternotomy wires are intact . A left chest cardiac device has two leads in stable position .
    OUTPUT:
    
Tiny right pleural effusion .