Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: An endotracheal tube is in satisfactory position approximately 4 cm from the carina . An enteric tube courses below the diaphragm with the tip out of the field of view . A new retrocardiac opacity is present , and may represent atelectasis . There may be a component of a small left pleural effusion . There is no right pleural effusion . The lungs are otherwise clear . There is no pulmonary edema or pneumothorax . The mediastinal contours are normal . The heart is mildly enlarged , and unchanged . A left - sided cardiac device and its wires are also unchanged .
    OUTPUT:
    
1 . Satisfactory position of the endotracheal tube . 2 . New retrocardiac opacity , which is presumably atelectasis . Aspiration or pneumonia can not be completely excluded . There may be a tiny left pleural effusion . Attention on followup radiographs is recommended .