Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right - sided chest tube is unchanged in position . A cardiomediastinal silhouette is unchanged . There is no focal consolidation or pulmonary edema . Bibasilar atelectasis is noted . There is no appreciable pleural effusion . Previously seen left apical pneumothorax is not seen on the current study , however the linear interface in the medial left lower lung with adjacent opacification may represent air adjacent to atelectatic lung parenchyma .
    OUTPUT:
    
1 . Previously seen left apical pneumothorax is no longer seen . 2 . Linear interface in the left lower lung may represent a small to moderate medial pneumothorax with adjacent atelectasis as seen on the prior study .