Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Semi supine chest radiograph was obtained . Given supine technique assessment of pneumothorax is limited without evidence of large pneumothorax . Small apical pneumothorax is likely still present . Lungs are low in volume with resultant bronchovascular crowding and linear basilar atelectasis . Cardiomediastinal contours are unchanged .
    OUTPUT:
    
No definite change in pneumothorax , although supine positioning limits assessment .