Fig. 4From: Clinical comparative analysis of 3D printing-assisted extracorporeal pre-fenestration and Castor integrated branch stent techniques in treating type B aortic dissections with inadequate proximal landing zonesL1: Approximately 1 cm distal to the origin of the LSA at the aortic plane, L2: At the level of the aorta just below the tracheal bifurcation, L3: At the anchoring zone at the distal end of the stentBack to article page