Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-upright radiograph of the chest demonstrates well expanded lungs with minimal bibasilar atelectasis , left greater than right . Cardiomediastinal and hilar contours are unremarkable . Tracheostomy tube ends 2 cm above the carina . A right - sided supraclavicular subclavian line ends at the mid SVC . There is no pneumothorax or pleural effusion .
    OUTPUT:
    
1 . Minimal bibasilar atelectasis , left greater than right . No pneumonia . 2 . Tracheostomy tube ends 2 cm above the carina .