多平面重组对正常成人圆孔的研究

目的:采用多层螺旋CT高分辨扫描和多平面重组(MPR)技术,多方位显示圆孔的正常形态并进行测量分析。方法:对167例正常受试者行高分辨薄层扫描。在工作站上对圆孔进行MPR重组,观察圆孔及其通连结构形态,测量其径限值。结果:MPR图像对圆孔的显示率为100%,圆孔在横断面和矢状面上呈管型、孔型或窗型,冠状面上多为圆形或椭圆形。其平均长度、前口和后口径分别为:(0.32±0.15)cm、(0.33±0.05)cm和(0.31±0.05)cm,同侧圆孔前口大于后口。结论:HRCT薄层扫描及MPR重组可清晰显示圆孔及其通连结构,有利于对其解剖形态的观察和径限的测量,为临床诊断及治疗方案的制定提供科学数据。

Multiplanar reformation in study of foramen rotundum in normal adults

Objective： To accurately analyze and measure the normal anatomy of foramen rotundum on multi-detector row CT （MDCT） with thin-section HRCT and multiplanar reconstruction （MPR） technologies. Methods： 16-MDCT scanning was performed on 167 subjects with normal foramen rotundum, and the MPR images were obtained on postprocessing workstation. The shape and size of the foramen rotundum was observed and measured. Results： The detection rate of foramen rotundum was 100%. The foramen rotundum was classified as canal, foramen and window types on axial and sagittal images, and presented as round or oval shape on coronal images. The mean length of foramen rotundum was （0.32±0.15） era. The mean diameter of artterior and posterior opening of foramen rotundum was （0.33± 0.05） cm and （0.31±0.05） cm respectively. Conclusion： MPR images could clearly visualize the morphologic features of the foramen rotundum, which may be helpful for making diagnostic and therapeutic decision because more imaging information can be obtained.