Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Again seen is a right PICC line with tip terminating in the low SVC . Median sternotomy wires are in position . Cardiomediastinal and hilar contours are stable . There is no pleural effusion or pneumothorax . The left retrocardiac opacity has improved since the prior study . No new focal parenchymal opacity is present .
    OUTPUT:
    
No pleural effusion .