Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: One portable AP semi-erect view of the chest . The tracheostomy tube ends 6 cm from the carina . Left chest tube ends medially in the left lung and is unchanged in position . NG tube ends in the antrum of the stomach . Cardiomediastinal contours are unchanged . Left upper and left lower lobe opacities either represent aspiration or pneumonia and are unchanged . No large pleural effusion or pneumothorax . Extensive subcutaneous emphysema is unchanged .
    OUTPUT:
    
No significant change in left upper and left lower lobe opacities .