多层螺旋CT曲面重组对正常成人腭鞘管特征的研究

目的 采用MSCT高分辨扫描多方位显示腭鞘管并进行测量分析.方法 采用MS CT高分辨扫描和MPR及CPR技术对167例(男83例,女84例)翼腭窝结构正常受试者行高分辨率CT(HRCT)多方位薄层扫描,显示腭鞘管及其通连结构的正常形态,并在横断、冠状及斜矢状面上观察腭鞘管的走行和形态,测量其长度、前口、中口和后口径值.对所获数据进行单因素方差分析或两独立样本均数t检验.结果HRCT及其CPR图像对167例腭鞘管的显示率为98,8%(330/334),左侧腭鞘管平均长度为(1.18±0.22)cm,的、中、后口径分别为(0.19±0.06)、(0.10±0.04)和(0.16±0.07)cm,前口大于后口,中口最小(F=211.109,P<0.01).右侧腭鞘管平均长度为(1.07±0.29)cm,前、中、后口径分别为(0.19±0.06)、(0.10±0.03)和(0.16±0.06)cm,前口大于后口,中口最小(F=139.350,P<0.01).腭鞘管长度在男性[左:(1.18±0.22)cm;右:(1.12±0.31)cm]和女性[左:(1.07±0.25)cm;右:(1.02±0.25)cm]之间差异无统计学意义(左侧:t=0.919,右侧:t=1.117;P值均>0.05).不同性别左侧腭鞘管的几径[前、中、后口径:男性分别为(0.19±0.06)、(0.10±0.04)、(0.16±0.07)cm;女件分别为(0.20±0.08)、(0.10±0.04)、(0.15±0.05)cm]和右侧腭鞘管的口径[前、中、后口径:男性分别为(0.19±0.06)、(0.10±0.04)、(0.16±0.06)cm;女性分别为(0.20±0.06)、(0.09±0.04)、(0.15±0.05)cm]比较差异无统计学意义(t值:左侧分别为-1.183、0.190、1.660,有侧分别为-1.420、1.210、0.802;P值均>0.05).结论HRCT薄层扫描及CPR重组可清晰显示腭鞘管及其通连结构,有利于其解剖形态的观察和径线的测量.

Anatomy of palatovaginal canal in normal adults: multi-slice spiral CT and curved planar reconstruction studies

Objective To muhi-directionally visualize and measure the normal anatomy of palatovaginal canal and its communications with high-resolution multi-slice spiral CT and its post-processing technologies.Methods One hundred and sixty-seven subjects with normal PPF and its communications were examined by 16-MSCT using high-resolution technique.The MPR and CPR images of palatovaginal canal were obtained on postproeessing workstation.The length and diameter of the palatovaginal canal and its communications was measured and analyzed with one way ANOVA analysis and independent samples t test.Results In this study, the detection rate of palatovaginal canal on 167 subjects was 98.8% (330/334).The mean length of left and right palatovaginal canal was (1.18 ± 0.22) cm and (1.07 ± 0.29) cm, respectively.The mean diameter of anterior opening (0.19±0.06)cm was significantly larger than median (0.10 ± 0.04) cm and posterior opening (0.16 ± 0.07)cm in left palatovaginal canal (F = 211.109, P < 0.01).Similarly,The mean diameters of anterior, median and posterior opening in right palatovaginal canal were (0.19±0.06)cm, (0.10±0.03)cm and(0.16±0.06) cm, respectively (F = 139.350,P <0.01).No significant difference on length measurements was revealed between the men [left: (1.18±0.22) cm; right: (1.12 ± 0.31)cm] and women [left: (1.07±0.25)cm; fight: (1.02±0.25)cm] (left: t = 0.919, P > 0.05 ;right:t = 1.117,P > 0.05).Between the men [left: (0.19±0.06) cm, (0.10 +0.04) cm and (0.16±0.07) cm; right: (0.19±0.06) cm,(0.10±0.04) cm,(0.16±0.06) cm] and women [left: (0.20±0.08) cm, (0.10±0.04) cm and (0.15±0.05) cm; right: (0.20±0.06) cm, (0.09± 0.04) cm and (0.15±0.05) cm], no significant difference on diameter measurements was revealed (left: t =- 1.183,0.190 and 1.660 ; fight: t = - 1.420,1.210 and 0.802 ; all P > 0.05).Conclusion On the basis of high-resolution MDCT scan, MPR and CPR images could visualize clearly the morphologic features of the palatovaginal canal, which may be helpful for making diagnostic and therapeutic decisions because more imaging information could be obtained.