Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The radiograph time stamped 21 :46 shows a low - lying endotracheal tube which enters the right mainstem bronchus . The left PICC line terminates in the right atrium . Withdrawal by 3 cm would position its tip near the cavoatrial junction . A left apical chest tube remains in place . Lung volumes are low . There is no pneumothorax . Worsening bilateral airspace and interstitial opacities are most likely due to worsening pulmonary edema . There is no pleural effusion . Mild cardiomegaly despite the projection is unchanged . The followup radiograph time stamped 22 :49 shows interval repositioning of the ET tube , which now terminates in the mid trachea . There is also a new tiny left apical pneumothorax with a left apical chest tube in place . The left PICC line has been slightly withdrawn , but still enters the upper right atrium . Withdrawal by 2 cm would position its tip at the cavoatrial junction . No other relevant change . The most recent radiograph of 03 : 57 hrs shows a slight change in the position of the left PICC line , which just barely enters the right atrium . Withdrawal by 1 - 2 cm with position its tip in the low SVC . There is no definite pneumothorax . Bandlike opacities at both lung bases are likely due to atelectasis . Mild pulmonary edema has slightly improved . A persistent retrocardiac airspace opacity may be due to atelectasis or aspiration .
    OUTPUT:
    
Previously low lying ET tube entering the right mainstem bronchus now terminates in the mid trachea . Slightly low lying left PICC line terminates in the upper right atrium . Withdrawal by 1 - 2 cm would position its tip at the superior cavoatrial junction . Tiny left apical pneumothorax not seen on the most recent exam . Improved mild pulmonary edema , right basilar subsegmental atelectasis , and a left basilar airspace opacity which may be due to atelectasis or aspiration .