Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: An endotracheal tube tip terminates approximately 9 cm from the carina , at the level of the thoracic inlet . An enteric tube tip courses below the left hemidiaphragm , and off the inferior borders of the film . Remainder of the examination is unchanged . The cardiac and mediastinal contours are similar . Persistent retrocardiac opacity likely reflective of atelectasis is present . Deformity of the left ninth and tenth posterolateral ribs may again reflect acute or subacute rib fractures .
    OUTPUT:
    
Endotracheal tube is slightly high in positioning , terminating approximately 9 cm from the carina , and can be slightly advanced for optimal positioning . Enteric tube tip within standard position . Retrocardiac atelectasis .