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Fig. 1 | BMC Surgery

Fig. 1

From: The relationship of tongue fat content and efficacy of uvulopalatopharyngoplasty in Chinese patients with obstructive sleep apnea

Fig. 1

Magnetic resonance imaging analysis. A) Sagittal view of segmentation in tongue with segmentation of tongue (area in yellow). B) The region of tongue fat which is marked in red. C) Upper airway is divided into two parts: Retropalatal (RP) area is from the level of hard palate to the tip of uvula (transparent yellow); Retroglossal (RG) area is from the level of the tip of uvula to the base of epiglottis (transparent green). D) The diagram of landmarks which are used to calculate the length from posterior nasal spine (PNS) to hyoid (Hy) and soft palate tip (SPt). The angle of tongue base is defined as the inferior margin of geniohyoid and the posterior of pharyngeal wall

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BMC Surgery

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