Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient has been extubated . The pulmonary artery catheter has been adjusted and is now in appropriate positioning . There is no change in the sternotomy wires and mediastinal drains . The NG tube has been removed . The lucency outlining the aortic knob is less evident on today 's examination and there is no evidence of pneumothorax . There are no focal consolidations . The pulmonary vasculature is normal . There is a stable postoperative appearance of the mediastinum , without interval widening to suggest hemorrhage . The small left pleural effusion has slightly increased in size .
    OUTPUT:
    
1 . Interval extubation with appropriate positioning of all other lines and tubes . 2 . No evidence of pneumothorax on today 's examination . 3 . Stable postoperative appearance of the mediastinum . 4 . Small left pleural effusion .