Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable AP chest radiograph demonstrates a left chest cardiac device , its leads which appear intact in in similar position relative to prior examination . Several surgical clips project over the left mediastinal border . Median sternotomy wires appear intact . A right pleural catheter projects over the right lower lobe in unchanged position . There is no pneumothorax . Probable trace right pleural fluid is present . Relative to prior examination , lung volumes are decreased . Right perihilar opacity is grossly unchanged relative to prior study . Heart size is upper limits of normal . There is no evidence of pulmonary edema .
    OUTPUT:
    
Overall stable appearance of the chest with right perihilar opacity and probable trace right pleural fluid . No large pneumothorax .