Figure 2.

RS8 anatomical segmentectomy was planned. (A) Preoperative right-lung three-dimensional reconstruction. Black solid lines represent the virtual intersegmental plane; (B) after the arterial-ligation-alone method, the expansion-collapse boundary between the excluded segment (pink) and the remaining lung (dark red) was shown. The solid blue line represents the first real intersegmental plan; (C) after the ligation of the targeted bronchi and veins, the expansion-collapse boundary was visible again. The solid yellow line represents the second real intersegmental plane. The solid black line represents the margin with the most obvious difference between the 2 intersegmental planes. *, star segment. D, distance; RS, right segment.