Fig. 3From: Volumetric measurements of paranasal sinuses and examination of sinonasal communication in healthy Shetland ponies: anatomical and morphometric characteristics using computed tomographySinonasal communication channels between nasal cavity and Rostral maxillary (a) and Caudal maxillary sinus (b). Continuous communication can be seen on the left side, but not on the right side (yellow arrows)Back to article page