Fig. 7From: Do the dimensions of the hard palate have a relationship with the volumes of the upper airways and maxillary sinuses? A CBCT studyVolumetric analysis of the upper airways. A Sagittal and axial reconstructions—Region of Interest (ROI) for upper airway segmentation, and threshold selection for semi-automatic airway filling. B Sagittal reconstructions—Upper airways filled, and segmentation for individualization of the nasopharynx (N)—blue region, and oropharynx (O)—pink region. PNS: posterior nasal spine; C1: first cervical vertebraBack to article page