Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Subtle lucency within the left lung base with deep sulcus sign corresponds to the pneumothorax better seen on the previous chest CT . Numerous anterior bilateral rib fractures are also better appreciated on the prior CT . There has been no interval change in the cardiac or mediastinal contour , and no rightward shift of midline structures is appreciated . The endotracheal tube has been withdrawn and now terminates approximately 5 cm from the carina . There has been interval placement of an enteric tube with tip at the gastroesophageal junction . Left - sided pacemaker device is again noted . Lung volumes remain low with crowding of bronchovascular structures . Patchy opacities within the lung bases likely reflect a combination of atelectasis and aspiration .
    OUTPUT:
    
1 . Subtle lucency within the left lung base with deep sulcus sign corresponds to the previously seen pneumothorax on CT and overall , findings appear unchanged compared to the chest radiograph performed earlier in the day . No significant contralateral mediastinal shift . 2 . Interval withdrawal of the endotracheal tube which is now in standard position . Enteric tube has been placed with tip at the gastroesophageal junction and should be advanced for optimal positioning within the stomach . 3 . Bibasilar patchy opacities compatible with a combination of atelectasis and aspiration . 4 . Known bilateral anterior rib fractures are better seen on the recent CT .