Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Bili definition of the descending thoracic aorta on for is compatible with fluid from esophageal perforation seen tracking within the mediastinum . No pneumomediastinum or pneumothorax is seen . Bibasilar atelectatic changes are noted . Known small bilateral pleural effusions on CT are not well seen on the current exam . The pulmonary vasculature is normal . No free air is seen under the diaphragms . There are no acute osseous abnormalities .
    OUTPUT:
    
Ill - defined descending thoracic aortic contour is compatible with fluid in the mediastinum as a result of known esophageal perforation . Bibasilar atelectasis . Known small bilateral pleural effusions seen on CT are not clearly visualized on this exam . No pneumoperitoneum or pneumomediastinum identified .