Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: ET tube , NG tube , chest and mediastinal tubes have been removed . There is no pneumothorax . Small pneumomediastinum has improved . Lung volumes are low . Pleural effusion is small if any . Right - sided Swan - Ganz is either in the left pulmonary artery or main pulmonary artery .
    OUTPUT:
    
1 . There is no pneumothorax after chest tube removal . 2 . Improvement of small pneumomediastinum .