Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-upright radiograph of the chest demonstrates low lung volumes the resulting bronchovascular crowding . Again seen is mild bibasilar atelectasis , which is not significantly changed from the study earlier today . The cardiomediastinal and hilar contours are stable . Slight interval decrease in gaseous distention of the stomach is noted . There is no pneumothorax or consolidation .
    OUTPUT:
    
Stable mild bibasilar atelectasis . No pneumothorax .