Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval removal of the endotracheal and nasogastric tubes . A catheter projects over the left hemithorax . The right internal jugular introducer remains with the tip in the upper SVC . Considerable fracture of the wires at the upper sternum is a preoperative finding . Lung volumes are improved . Left lung opacification has improved although left basilar atelectasis and small pleural effusion have slightly increased after extubation . The right lung is clear . No appreciable pneumothorax . The mediastinum is less wide . Moderate cardiomegaly is similar to the prior study .
    OUTPUT:
    
No appreciable pneumothorax .