多层螺旋CT诊断眶内壁纸样板变异的价值

目的探讨多层螺旋CT薄层扫描后处理技术在诊断眶内壁纸样板变异中的价值。方法35例眶内壁纸样板变异患者，多层螺旋CT扫描后进行多平面重组和容积再现处理，评价纸样板变异的显示效果。结果35例纸样板变异表现为弧形或裂隙状内移；横轴位和冠状位在显示变异位置和凹陷深度上差异无统计学意义（P〈0．05），均优于矢状位（P〈0．05）；对凹陷范围评估，横轴、冠状和矢状位之间差异均有统计学意义（P〈O．05），以横轴位最准确；容积再现显示9例纸样板边缘位置的凹陷变异。结论多层螺旋CT后处理技术对纸样板变异的显示有重要价值，横轴位和冠状位图像对眶内壁纸样板变异的显示效果良好，容积再现对评价边缘位置的变异有一定价值。

Diagnostic value of multi-slice spiral CT post-processing technique to lamina papyracea variations

Objective To explore the diagnostic value of reconstruction protocols to lamina papyracea variations by using multi-slice spiral CT post-processing technique. Methods Thirty-five cases of lamina papyracea variations were evaluated by using multi-plane reformation （MPR） and volume rendering （VR）. Results All 35 cases of lamina papyracea variations showed as arc or slit innershift of lamina papyracea. The axis and coronal images illustrated the localization and depth of variations more clearly than the sagittal images （P~0.05）. The axial images were better than sagittal and coronal images in evaluating area involved （P〈0.05）. The VR images showed variations in the marginal area of lamina papyracea in 9 cases. Conclusions Post-processing technique of multi-slice spiral CT is essential in evaluating lamina papyracea variations. Coronal and axial MPR have good images in displaying lamina papyracea variation. VR has a great value to evaluating the marginal variation in lamina papyracea.