Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left - sided pigtail catheter and left - sided chest tube are unchanged in appearance . A left - sided central venous catheter terminates in the upper to mid SVC and is unchanged . An enteric tube ends below the field of view . An endotracheal tube ends 5 cm above the carina . The cardiomediastinal and hilar contours are within normal limits and stable . Mild pulmonary edema has minimally decreased from the prior exam . Bibasilar opacities are again seen , minimally improved from the prior study and may represent atelectasis however infection can not be excluded . A vertical area of lucency paralleling the left lower thoracic vertebra is unchanged and represents a small to moderate anterior , medial left pneumothorax not significantly changed in size from the prior study .
    OUTPUT:
    
1 . Persistent small to moderate anterior , medial left pneumothorax not significantly changed in size . 2 . Bibasilar opacities , minimally improved from the prior study may represent atelectasis however infection can not be excluded .