High Resolution CT Study of Palatovaginal Canal

YANG Bentao, WANG Zhenchang, LIU Sha,et al. Department of Radiology, The Affiliated Beijing Tongren Hospital of Capital University of Medical Sciences, Beijing 100730, P. R. China  

Objective To investigate whether or not the palatovaginal canal can be identified on HRCT and its normal findings.Materials and Methods The image datas about 100 normal adults who had performed axial and coronal HRCT of the pterygopataline fossa were analysed.Results HRCT can reveal well defined contour of the palatovaginal canal according to the data on axial and coronal image. On axial HRCT, the palatovaginal canal was located behind of the pterygopalatine fossa and medial of the front part of pterygoid canal,showing narrow cone shaped. On coronal HRCT,the palatovaginal canal was located in inferomedial of the pterygoid canal and the roof of nasopharynx, which had different shapes appearing as round shaped in 52 cases (52%), ovoid-shaped in 43 (43%) and irregular shape in 5 (5%).Palatovaginal canal was divided into panocanal, semicanal and mixed canal type, 40 cases (40%), 32 (32%) and 28 (28%) respectively. The average maximum width of the diameter of palatovaginal canals was 1.0 mm(0.4～2.7 mm)on coronal plane. The parameter was no significant difference in sexes and two sides (P0.05). Conclusion On HRCT axial and coronal planes, the palatovaginal canal can be definitely identified, better of the coronal plane, HRCT may reveal more clearly and accurately the palatovaginal canal and the relationship with the pterygopalatine fossa, pterygoid canal and round foramen. On both axial and coronal plane HRCT may also easily demonstrate the early bone lesion of the palatovaginal canal.

【CateGory Index】： R816.96

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