Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes remain low . There has been interval removal of the endotracheal , nasogastric , and left chest tubes and Swan - Ganz catheter . Right internal jugular vascular sheath remains , terminating in the upper SVC . No pneumothorax . Cardiomegaly is slightly increased . Postoperative mediastinum is stable . Small bilateral pleural effusions are slightly larger than on ___ ___ .
    OUTPUT:
    
1 . No pneumothorax . 2 . Small bilateral pleural effusions are slightly larger than on ___ .