单侧轴位CT多平面重组在诊断大前庭导水管中的价值

目的探讨单侧轴位CT多平面重组(MPR)在大前庭导水管诊断中的应用价值。资料与方法选取18例35耳前庭导水管扩大畸形患者的MPR图像,利用原始图像获取对称性轴位和单侧轴位前庭导水管最大显示MPR图像,测量两种图像中前庭导水管中段的管径大小并行统计学处理。结果在单侧轴位前庭导水管最大显示MPR图像上测量的结果等于或大于在前庭导水管最大显示MPR图像上测量的结果,其中6耳测量结果相同,4耳相差0.1mm,13耳相差0.2mm,12耳≥0.3mm,用配对t检验两组数据差异有显著统计学意义(P<0.01)。结论单侧轴位MPR最大显示图像对前庭导水管扩大的精确测量具有重要价值,有利于对前庭导水管扩大畸形的诊断。

Diagnostic Value of the Unilateral Axial CT Multiplanar Reformation in Large Vestibular Aqueduct

Objective To explore the value of unilateral axial CT multiplanar reformation in measuring the large vestibular aqueduct.Materials and Methods Eighteen cases including thirty five ears undwent MSCT sanning of the temporal bones.The MPR images of the full long limbs demonstrated bilaterally and unilaterally were obtained from the original data.The vestibular aqueduct midpoint widths showed on bilateral and unilateral MPR images were analyzed statistically.Results The widths measured on unilateral axial MPR were equal or bigger than that on bilateral axial MPR.The results of bilateral and unilateral MPR were equal in 6 ears.The subtraction between bilateral and unilateral MPR was 0.1mm in 4 ears,0.2 mm in 13 ears,and bigger than 0.3 mm in 12 cases.There was statistically significant difference between bilateral and unilateral MPR(P<0.01).Conclusion The unilateral axial MPR image is better in diagnosis of large vestibular aqueduct malformation.