Fig. 4From: The efficacy of different treatment approaches for pediatric OSAHS patients with mandibular retrognathia: study protocol for a multicenter randomized controlled trialMorphologic analysis of upper airway. a Localization planes of CBCT images. b Segmented upper airway. c Minimum cross-sectional area (CSAm) on the axial slice of the CBCT image. PNS posterior nasal spine, TUV tip of the uvula, TEP tip of the epiglottis, ATCV anteroinferior aspect of the vertebral body of the third cervical vertebra, AP anteroposteriorBack to article page