Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable supine radiograph of the chest demonstrates an endotracheal tube terminating approximately 3 cm above the carina . A transesophageal tube is incompletely imaged . Cardiomediastinal contours are or widened , without change since recent study of less than 2 hr earlier . Median sternotomy wires are well aligned and intact . Interval worsening of left lower lobe atelectasis and small left pleural effusion . Minor atelectasis at right lung base is new . .
    OUTPUT:
    
Endotracheal tube terminates approximately 3 cm above the carina . Persistent widening of cardiomediastinal contours , not optimally assessed on a portable supine radiograph . Although potentially due to accentuation of vascular structures and excessive mediastinal fat , CT may be helpful to exclude mediastinal hematoma or will lymphadenopathy , if warranted clinically .