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Minimal Cross-Sectional Area of the Pharynx. A1, A2: Cross-sectional area, endoscopic, 3D CT (414.4 mm2, 291.4 mm2). B1, B2: Vertical midline diameter, endoscopic, 3D CT (16.6 mm, 22.8 mm). C1, C2: Maximum horizontal diameter, endoscopic, 3D CT (28.6 mm, 12.6 mm). Fields of view = 7.
