Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP chest radiograph . Right - sided PICC tip is just below the head of the clavicle . Tracheostomy tube is in stable position . Lung volumes are low with mild bibasilar atelectasis . The cardiomediastinal silhouette is normal .
    OUTPUT:
    
Right - sided PICC tip is either in the right brachiocephalic vein or the uppermost SVC .