Q. A 12-year-old male child comes to the clinic for a routine school evaluation. The patient has no significant past medical history except for frequent attacks of headaches. Vital signs show a blood pressure of 160/100 mm Hg, heart rate 100/min, respiratory rate 13/min, and a temperature of 36.9 degrees Celsius. The patient’s dorsalis pedis pulse is not detected bilaterally. Which of the following is expected to be seen in this patient's chest x-ray?