Dissection aorta chest-abdominalExam executive with OPTIMA CT 666 64.Executed technical multiphasic before and after m.d.c.administered ,you appreciate linear hypodensites intraluminal , with dissection , origin compatible ascending aorta ,interesting to the left subclavian artery, extending the aortic arch , descending thoracic , aorta abdominal to the common iliac artheries .