Fig. 1From: A novel anatomic severity grading score for acute Type B aortic dissections and correlation to aortic reinterventions after thoracic endovascular aortic repairProximal landing zone. Green bars (left) denote locations at which cross-sectional area measurements were made of the true and false lumens. At right, the process of measuring cross-sectional area of the true lumen (top) and false lumen (bottom) are shown in representative sections of the aortaBack to article page