Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP single view of the chest has been obtained with patient in sitting semi-upright position . Comparison is made with the next preceding similar study of ___ . On the present examination , the patient is slightly rotated to the right , which accounts for somewhat different presentation of the tracheostomy cannula . It is seen to terminate in unchanged position in the trachea . No pneumothorax is present . The heart size remains unchanged and is within normal limits . No pulmonary congestive pattern and no new acute infiltrates . Lateral pleural sinuses remain free .
    OUTPUT:
    
Stable chest findings in presence of tracheostomy . No pneumothorax .