Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable upright radiograph of the chest demonstrates persistent elevation of the right hemidiaphragm , obscuring the right lung base . There is minimal bibasilar atelectasis , left greater than right . Mediastinal and hilar contours are unchanged . Heart is top normal in size . There is no pneumothorax or pleural effusion .
    OUTPUT:
    
Minimal bibasilar atelectasis , left greater than right . No pneumonia .