Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP chest radiograph demonstrates stable positioning of the right Swan - Ganz , ETT , NGT , and two left chest tubes . There is no pneumothorax , but extensive subcutaneous emphysema limits evaluation . Overall , it is improved compared to ___ . Pneumoperitoneum is unchanged . Mild pulmonary edema persists in the left lung and minor fissure . Pulmonary vascular engorgement has slightly improved . Post-operative contour of the cardiomediastinal silhouette is stable .
    OUTPUT:
    
No pneumothorax , though improving subcutaneous emphysema limits evaluation .