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Created region behind the tip of epiglottis. A1, A2: Cross-sectional area, endoscopic, 3D CT (51.2 mm2, 69.9 mm2). B1, B2: distance from middle of epiglottis tip to posterior hypopharynx, endoscopic, 3D CT (5.6 mm, 5.3 mm). Fields of view = 2.
