Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable upright radiograph of the chest . A right apical pneumothorax persists , and is perhaps slightly smaller than on the prior study performed two days ago . There is persistent subcutaneous emphysema in the right chest wall . There is no evidence of tension . The pneumomediastinum is less apparent on the study . Subtle small right inferolateral pulmonary opacities persist . The hilar and cardiomediastinal contours are normal . There is a small amount of bilateral basilar atelectasis . The left costophrenic angle is blunted .
    OUTPUT:
    
1 . Persistent , but somewhat smaller right apical pneumothorax . 2 . Bibasilar atelectasis . Subtle small right inferolateral pulmonary opacities persist . 3 . Blunted left costophrenic angle , small effusion vs atelectasis . .