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Three-dimensional measurement and image registration of preoperative (white) and postoperative (blue) computed tomography scans. (A) Frontal view; (B) sagittal view; (C) horizontal plane, sagittal plane, and coronal plane defined by the markers. ANS = preoperative anterior nasalspine, ANS2 = postoperative anterior nasalspine, S = sella, N = nasion, OrL = orbitale left, OrR = orbitale right, PoL = porion left, PoR = porion right.
